
592 N.W.2d 767 (1999)
233 Mich. App. 457
PEOPLE of the State of Michigan, Plaintiff-Appellee,
v.
John Patrick REID, Defendant-Appellant.
Docket No. 190302.
Court of Appeals of Michigan.
Submitted November 4, 1998, at Grand Rapids.
Decided January 19, 1999, at 9:15 a.m.
Released For Publication March 23, 1999.
*770 Frank J. Kelley, Attorney General, Thomas L. Casey, Solicitor General, Susan K. Mladenoff, Prosecuting Attorney, and James B. Jenkins, Assistant Prosecuting Attorney, for the people.
State Appellate Defender (by C. Joseph Booker), for the defendant on appeal.
Before: WHITBECK, P.J., and MARK J. CAVANAGH and NEFF, JJ. *768
*769 WHITBECK, P.J.
A jury convicted defendant of two counts of first-degree criminal sexual conduct (CSC I), M.C.L. § 750.520b(1)(b)(iii); MSA 28.788(2)(1)(b)(iii), but acquitted him of a third CSC I count. The trial court sentenced defendant to ten to twenty-five years' imprisonment on each of his two convictions. We affirm. The convictions are based on charges that, while the then apparently fifteen-year-old complainant stayed the night of December 22-23, 1993,[1] at the home of defendant's parents, defendant performed fellatio on the complainant and had the complainant perform fellatio on him.[2]

I. Basic Facts
The complainant's father, who was a part-time reserve police officer, indicated that he knew defendant, who worked for an ambulance company, through interaction related to their respective work. The complainant's father testified that the complainant was having some problems in school and that he started to talk about these problems with defendant at some point before December 1993. Eventually, defendant offered to help by talking with the complainant:
[Defendant] said if you ever need someone to let him talk to or you know, someone that he can talk to that's willing to help, that he used to be a counselor at church and dealt with the kids and he would be willing to talk to him.

* * * * * *
[Defendant] kind of chuckled and said I can relate to [the complainant] because I was just like him when I grew up. He goes, I had a problemhe had problems when he was growing up. He didn't go into explanations, but he said he had problems when he was growing up, but he can relate to the kids and he seems to do really good with the kids, get a rapport going or whatever.
The complainant's father said that a few months thereafter, at some point several months before December of 1993, he availed himself of defendant's offered assistance and that the complainant spent time with defendant on three or four occasions including the night of the alleged incidents "[f]or the purpose of [defendant] talking to [the complainant]... [o]r like being counseled or whatever you want to call it." The complainant's mother testified similarly that the complainant was seeing the defendant for "[a] type of informal counseling that [defendant] had offered to work with [the complainant] and try and find out what his problem was, why he wasn't being real cooperative." The complainant's mother also testified that defendant told her that he had done some counseling before through his church and "that he had been able to work with some of the other *771 kids that he had talked to and help them out a bit."
According to the complainant's testimony, he met defendant through the complainant's father and probably spent time alone with defendant about four times over a two-month period. The first time, which was while the complainant was suspended from school, they went to a mall and a Taco Bell restaurant. The complainant talked with defendant about why he had been suspended from school and generally about what was going on in his life. The complainant explained that, when defendant picked him up, defendant told both the complainant and the complainant's father that "he [defendant] had counseled kids before, he was a counselor, I think, at his church." When asked why he thought he was with defendant, the complainant replied, "just because my dad didn't really want to leave me alone to sit there and watch TV because I was suspended, so he offered to take me for the day so I wouldn't be at home and have free run of the house." The complainant testified that during the second and third times he visited defendant, they went to defendant's residence in Hastings, but that they did not talk very much about what was going on in the complainant's life.
The complainant testified that, on December 22, 1993, he stayed with defendant at the house of defendant's parents. The complainant stated that defendant called him and asked him if he wanted to stay with him that night, told him that they "could stay up like all night playing the computer and games that he got," and mentioned that his wife would not be there. The complainant's mother testified that the complainant called her at work in the early evening of December 22, 1993, and asked if he could leave their house with defendant. However, the complainant was still home when the complainant's mother arrived home that evening. She testified that defendant arrived at about 9:00 p.m. and that she was concerned about the lateness of the hour at which defendant and the complainant were departing and about the approximate thirty-mile distance to defendant's residence. She said that "they decided if it got late that [the complainant] would just sleep on the couch there and he would come home the following morning."
The complainant testified that, on the way to the house of defendant's parents, defendant stopped at a gas station and asked him if he wanted a pack of cigarettes and that defendant then bought him a pack of "Marlboro reds" cigarettes. The complainant explained that defendant knew from their prior contact that the complainant smoked. Thereafter, they arrived at the house. Eventually, the complainant and defendant went downstairs to the basement where a computer and a bed were located. The two played with the computer for hours. At some point, after the complainant asked for something to drink, defendant went upstairs and apparently got some "7 Up" soda pop. Defendant gave the complainant a plastic glass that appeared to contain "7 Up." The beverage "tasted funny" to the complainant. However, he had not had "7 Up" for a long time and continued to drink it without any comment. After the complainant finished the first glass, he accepted defendant's offer of more glasses; the complainant thought that he probably had three or four glasses total, all of which had the same taste, in a period of about an hour to an hour and one-half.
After finishing either his first or second glass, the complainant saw defendant pour into the complainant's glass of soda pop a clear liquid from a tall bottle that had the word "vodka." At that point, the complainant described himself as feeling "[d]izzy, light-headed." Eventually, the complainant asked defendant what he had been pouring in the complainant's drinks, and defendant said, "oh, it's just some vodka." As time went on, the complainant felt "[d]izzy, hot, sweaty, light-headed." When asked if he knew what was going on around him, the complainant replied, "[n]ot very well, everything kind of looked like it was in slow motion."
The complainant indicated that, during the time they were in the basement, defendant instructed him to urinate in a two-liter bottle because he did not want the complainant to go upstairs and wake up his parents. The complainant thought that he urinated in the bottle twice.
According to the complainant, defendant eventually told him that he was drunk and *772 that he should take off his shirt and pants so that if he got sick he would not get them dirty and his mother would not know. When the complainant stood up, he felt "really dizzy and off balance a lot." The complaint removed his shirt and pants and lay on the bed; he was still wearing his underwear. Defendant brought up pictures on the computer of males holding their genitals. Eventually, defendant got on the bed with the complainant.[3]
The complainant indicated that while he was lying on the bed, defendant eventually rubbed the complainant's genitals through his underwear. The complainant described himself as feeling "[n]umb" at that point. Defendant eventually reached under the complainant's underwear, rubbed the complainant's genitals, and told the complainant to take his underwear off. The complainant rolled over on his side, and defendant removed the complainant's underwear and then all of his own clothes. Defendant then resumed fondling the complainant and told the complainant to fondle defendant, which the complainant did.
The complainant's testimony regarding time frames is somewhat confused. However, he indicated that at some point defendant went to tend to his baby, but then returned. According to the complainant, defendant eventually started to perform oral sex on him. The complainant testified that, at some point thereafter, defendant asked the complainant to perform oral sex on defendant and that he did so. The complainant described himself as feeling dizzy and light-headed while he performed oral sex on defendant.
Eventually, the complainant reported to his mother that defendant had sexually abused him, and this triggered a series of events that quite rapidly led to police involvement and investigation. The police searched the basement of the house where the complainant said he had been sexually abused. A police officer testified that he seized soiled "Kleenex tissues" that appeared to have a tacky "yellowish substance" on them. Detective David Walters testified that he found a twelve- or sixteen-ounce bottle that may have contained urine. Testimony from a state police laboratory analyst indicated that some of these tissues contained material that was consistent with having been emitted from a person with a B blood type, which was the complainant's blood type (and apparently also the blood type of defendant's wife), and that some of the tissues tested positive for the presence of seminal fluid.
Defendant did not testify at trial. However, defendant's wife testified on direct examination by defense counsel that she and defendant were living in the house of defendant's parents from August of 1993 until the time of the alleged incidents in December of 1993 and that their room was in the basement. Defendant's wife said that she and defendant were sexually active and responded affirmatively to defense counsel's questions regarding whether they had had sex "recently" before the alleged incidents on the bed in the basement. She indicated that Kleenex "[c]ould have been" used in connection with this activity.

II. Standards of Review
In reviewing whether the evidence was sufficient to sustain defendant's convictions, which we do in § III of this opinion, we view the evidence in the light most favorable to the prosecution to determine whether a rational factfinder could have found the essential elements of the crime proved beyond a reasonable doubt. People v. Medlyn, 215 Mich.App. 338, 340, 544 N.W.2d 759 (1996).
In considering the allegations of prosecutorial misconduct, which we do in § IV and § VI, we consider the alleged misconduct in context to determine whether it denied defendant a fair and impartial trial. People v. Paquette, 214 Mich.App. 336, 342, 543 N.W.2d 342 (1995). However, with regard to defendant's unpreserved allegations of prosecutorial misconduct, review is foreclosed unless no curative instruction could have removed any undue prejudice to defendant or manifest injustice would result from *773 failure to review the alleged misconduct. Id. at 341-342, 543 N.W.2d 342.
In reviewing defendant's claim of an erroneous jury instruction, which we do in § V, we review de novo. People v. Hubbard (After Remand), 217 Mich.App. 459, 487, 552 N.W.2d 493 (1996).

III. Sufficiency of the Evidence
Defendant was convicted of two counts of CSC I under the following statutory provision:
A person is guilty of criminal sexual conduct in the first degree if he or she engages in sexual penetration with another person and if any of the following circumstances exists:

* * * * * *
(b) That other person is at least 13 but less than 16 years of age and any of the following:

* * * * * *
(iii) The actor is in a position of authority over the victim and used this authority to coerce the victim to submit.
Thus, conviction of CSC I under this provision requires proof of four elements: (1) the defendant sexually penetrated another person (the complainant), at a time when (2) the complainant was at least thirteen, but less than sixteen, years old, (3) the defendant was in a position of authority over the complainant, and (4) the defendant used this authority to coerce the complainant to submit to the sexual penetration. Defendant argues that there was insufficient evidence to support his CSC I convictions on the ground that the evidence did not support a conclusion that he used a position of authority to coerce the complainant to submit.[4] We disagree.
As an initial matter, there was sufficient evidence to conclude that defendant was in a position of authority over the complainant at the time of the incidents. The complainant's father testified that defendant told him that defendant had been a counselor at a church and would be willing to talk with the complainant about the complainant's problems. Both of the complainant's parents expressed an understanding that the complainant was spending time with defendant for defendant to counsel him. Also, according to the complainant's testimony, defendant stated to the complainant, in front of the complainant's father, that he was a counselor.
From the foregoing, a rational jury could infer, beyond a reasonable doubt, that the complainant's parents placed defendant in a position of authority over the complainant, particularly at times when they allowed the complainant to spend time with defendant outside their presence, and that the complainant was aware of this. Indeed, on the occasion of the first meeting between the complainant and defendant, the complainant's father delivered the complainant into defendant's care on a day that the complainant was suspended from school. Further, the testimony of the complainant's mother indicated that she entrusted the complainant to defendant's care on the night of the alleged incidents. Thus, a reasonable factfinder could determine beyond a reasonable doubt from this evidence, viewed in a light most favorable to the prosecution, that before and continuing at the time of the charged incidents, defendant was acting in a position of authority over the complainant.
Next, we must examine whether there was sufficient evidence to support a finding that defendant used that position of authority to coerce the complainant to submit to the charged acts of sexual penetration underlying his convictions. It is important to bear in mind that, "[f]orce or coercion is not limited to physical violence but is instead determined in light of all the circumstances." People v. Brown, 197 Mich.App. 448, 450, 495 N.W.2d 812 (1992).
While not exactly on point because they did not expressly involve an allegation of use of a position of authority to coerce a victim to submit, two previous opinions from this Court regarding what constitutes coercion are highly instructive: People v. Regts, *774 219 Mich.App. 294, 555 N.W.2d 896 (1996), and People v. Premo, 213 Mich.App. 406, 540 N.W.2d 715 (1995). In Premo, at 410-411, 540 N.W.2d 715, quoting Black's Law Dictionary (5th ed.), 234, the panel stated that coercion "`may be actual, direct, or positive, as where physical force is used to compel act against one's will, or implied, legal or constructive, as where one party is constrained by subjugation to other to do what his free will would refuse.'" (Emphasis supplied.) In Regts, supra at 295-296, 555 N.W.2d 896, this Court, noting the discussion of "implied, legal or constructive" coercion[5] in Premo, stated:
In the case at bar, defendant, as the victim's psychotherapist, manipulated therapy sessions to establish a relationship that would permit his sexual advances to be accepted without protest. That is, he subjugated the victim into submitting to his sexual advances against her free will. Accordingly, the circuit court properly reinstated charges with respect to all "coercion" theories.
Viewing the evidence in the light most favorable to the prosecution, defendant placed himself, with regard to the complainant, in a role highly analogous for present purposes to that of a psychotherapist with a patient. Defendant indicated to the complainant's father and the complainant that he had acted in a counseling role at a church and talked with the complainant about problems that he was having. Having established a position of trust with the complainant's parents, defendant invited the complainant to spend the night at the house of defendant's parents. Indeed, the complainant's testimony that defendant asked him to come over to play on a computer could reasonably have been taken by the complainant and his parents as part of an effort by defendant as an unofficial "counselor" to continue developing a rapport with the complainant. A reasonable jury could infer from this evidence that defendant manipulated his "counseling" role with the complainant"a position of authority"in order to have the complainant alone where defendant could sexually assault him.
According to the complainant, on the night of the incidents, defendant, while acting in this position of authority over the complainant, gave the complainant beverages that he "spiked" with alcohol and had the complainant consume these beverages to the point of becoming heavily intoxicated. A reasonable jury could infer that this was done with the intent to reduce the complainant's inclination or ability to resist engaging in sexual activity with defendant. The complainant's testimony strongly reflects that he was disoriented at the time of the acts of fellatio and that he was, in large part, mechanically following the commands of defendant with regard to his actions or lack of resistance. He described himself as feeling as if he were in a "bad dream" during the encounter. Viewing the evidence most favorably to the prosecution in light of all the circumstances, Medlyn, supra, defendant used a position of authority over the complainant to engineer a quite elaborate series of events to place the complainant in a confused and disoriented condition and then took advantage of the complainant's condition to perform fellatio on the complainant and to instruct successfully the complainant to perform fellatio on him. This is sufficient evidence for a rational factfinder to conclude that the complainant was "constrained by subjugation," Premo, supra at 411, 540 N.W.2d 715, and, thus, coerced into submitting *775 to these acts of sexual penetration by defendant through use of his position of authority over the complainant.
Moreover, in Premo, supra at 407, 540 N.W.2d 715, the defendant was convicted of three counts of fourth-degree criminal sexual conduct (CSC IV)[6] based on charges that, while a teacher at a high school, he pinched three female students on their buttocks on the premises of the high school. This Court held that this conduct involved coercion:
We believe that defendant's actions constituted implied, legal, or constructive coercion because, as a teacher, defendant was in a position of authority over the student victims and the incidents occurred on school property. Defendant's conduct was unprofessional, irresponsible, and an abuse of his authority as a teacher. Accordingly, we conclude that defendant's conduct in this case is sufficient to constitute coercion under M.C.L. § 750.520e(1)(a); MSA 28.788(5)(1)(a). [Id. at 411, 540 N.W.2d 715.]
In this regard, a common feature of the situation with the teacher in Premo and the psychotherapist in Regts is that the victims were in a position of special vulnerability with respect to the defendants. Similarly, in this case, a reasonable jury could have found that defendant exploited the special vulnerability attendant to his relationship with the complainant to abuse him sexually. While it is true that defendant in this case did not hold a formal position, such as being a school teacher, we find that inconclusive. There certainly was sufficient evidence to support a finding that defendant was placed in a substantially similar position of practical authority over the complainant. The defendant teacher in Premo occupied a position in which he was generally charged with control and supervision of students at his high school. Here, there was evidence that the complainant's parents had entrusted the complainant to defendant's care. Further, viewing the evidence in a light most favorable to the prosecution, the complainant was alone with defendant at a location where the complainant was isolated from others and subject to the general control of defendant. These circumstances further support our conclusion that there was sufficient evidence that defendant used a position of authority to coerce the complainant to participate in two acts of fellatio.
Defendant, however, relies in substantial part on the Michigan Supreme Court's summary decision in People v. Usman, 428 Mich. 902, 406 N.W.2d 824 (1987), in which the Court reversed the defendant's conviction of second-degree criminal sexual conduct "because there was no evidence that the defendant used a position of authority to coerce the 14-year-old complainant to submit to sexual contact." In our view, the brief summary discussion in Usman does not include factual background concerning the allegations in that case and, thus, does not explain why the evidence in that case was insufficient to support a finding that the defendant used a position of authority to coerce submission to sexual contact.
Defendant would have us give meaning to the Supreme Court's order in Usman by drawing the pertinent facts of that case from the unpublished opinion of this Court that was being appealed to the Supreme Court. People v. Usman, unpublished opinion per curiam of the Court of Appeals, decided September 11, 1986 (Docket No. 81096). However, while we respect and commend appellate defense counsel's diligence and zealous advocacy in researching and presenting the unpublished opinion underlying the Supreme Court's summary decision in Usman, we conclude and hold that nothing in that unpublished opinion should be considered in determining what is binding precedent under our Supreme Court's decision in Usman, for two separate reasons.
*776 First, by its result, the Supreme Court in Usman disapproved the holding of this Court on the fact-intensive issue of the sufficiency of the evidence. Against that background, we conclude that none of the factual discussion in this Court's unpublished opinion should be accepted as accurate, because it is reasonably conceivable that an error in some part of the factual discussion of the unpublished opinion was the basis for its reversal. Second, MCR 7.215(C)(1) expressly provides that an unpublished opinion of this Court "is not precedentially binding under the rule of stare decisis." Thus, absent the Supreme Court expressly adopting all or part of an unpublished opinion of this Court, it would be inappropriate to consider any part of such an unpublished opinion as substantively binding in an unrelated case.
In sum, we hold there was sufficient evidence to support defendant's convictions.

IV. Alleged Prosecutorial Misconduct Related to Defendant's Wife

A. Request for a Blood Test
Defendant claims that the prosecutor committed misconduct by requesting the trial court to order defendant's wife to undergo a blood test. We disagree. On the first day of trial, outside the presence of the jury, the prosecutor requested the trial court to issue an order requiring the taking of a blood sample from defendant's wife. The trial court took the request under advisement and apparently never actually ruled with respect to the request. Whether the events are properly characterized as an implicit denial of the request or an abandonment of the request by the prosecution, the end result was that no such blood test was ordered by the trial court. At trial, the testimony of a state police laboratory analyst indicated that some tissues seized from the basement included material from someone with a B blood type. There was also evidence that the complainant had a B blood type, and the complainant testified that he was not sure if he ejaculated during the encounter with defendant. Evidently, the prosecutor desired a blood test of defendant's wife to ascertain, if possible, whether any of the fluids on the tissues emanated from her. Regardless of how the trial court should have ultimately ruled with respect to this matter if it had been pursued further, we see no improper prosecutorial conduct by simply making this nonfrivolous request outside the jury's presence. Thus, the prosecutor's request for blood testing of defendant's wife did not deny defendant a fair trial. Paquette, supra at 342, 543 N.W.2d 342.

B. Prosecutorial Cross-Examination of Defendant's Wife
Defendant also argues that the prosecutor improperly questioned defendant's wife regarding her resistance to taking a blood test. We again disagree. On direct examination by defense counsel, defendant's wife testified, in essence, that she and defendant engaged in sexual activity in the basement shortly before the time that the complainant asserted that he was sexually assaulted by defendant and that Kleenex could have been used in connection with this. In short, defense counsel elicited this testimony as evidence that the soiled tissues found by the police in the basement (and determined by the state police analyst to include the presence of seminal fluid) may have resulted from such marital sexual activity, thereby reducing the value of the evidence of the tissues as corroborating evidence to support the complainant's version of events.
Thereafter, the following exchange occurred at the beginning of the cross-examination of defendant's wife by the prosecutor:

Q. Mrs. Reid, the last question [defense counsel] asked you, you indicated that you're a type B blood; is that correct?

A. Yes, it is.

Q. Do you know whether you're a secretor or nonsecretor?

A. I don't know.

Q. In fact, I asked at the beginning for a sample of your blood.
[Defense counsel]: I object to that, Judge, that's improper.
[The prosecutor]: I'm asking if she was aware.
[Defense counsel]: He never asked this witness.

*777 [The prosecutor]: Well, I didn't ask that question. I'm asking her if she's aware I've asked for a sample of her blood to be tested.
The Court: She can respond.
The Witness: Yes, I'm aware of it.
Q. And, in fact, you were also aware that the defense has objected to that?
A. On my request, yes.

Q. You heard the testimony that there was blood found on the tissues next to the bed?

A. Yes.

Q. And you also heard that your husband is a nonsecretor?

A. Yes.

Q. Do you know where that came from?

A. The information?

Q. No, the blood.

A. I don't know.
Q. You understand that it wouldn't come from your husband?
A. Yes, I do.
Q. You still object to having your blood tested so the jury can hear the results?
A. Yeah, I feel I should have been asked for it to begin with.

Q. So you are objecting?

A. Yes.

Q. Do you know your PGM sub-type?

A. No, I don't. I've been blood typed, I've received transfusions.
Q. But you don't know your PGM?

A. I don't know, no. [Emphasis supplied.]
We reject defendant's claim that the prosecutorial cross-examination at issue was improper. While the prosecution may not use a defendant's failure to present evidence as substantive evidence of guilt, the prosecution is entitled to contest fairly evidence presented by a defendant. Cf. People v. Fields, 450 Mich. 94, 110-111, 538 N.W.2d 356 (1995). Further, a witness is subject to cross-examination concerning any issue in a case, including credibility. MRE 611(b). The conduct of defendant's wife in resisting participation in a blood test was highly probative of her credibility. Her testimony regarding the sexual activity with defendant suggested that this sexual activity may have been the source of the soiled tissues found by the police in the basement. If defendant's wife was being forthcoming in this regard, one could reasonably believe that she would have been eager to provide a blood sample that might corroborate her testimony by providing a genetic or blood-typing match between herself and the body fluids on some of the tissues seized by the police. Conversely, the prosecutor's eliciting of testimony on cross-examination indicating that she opposed submitting to a blood test could reasonably be viewed as strongly undermining the credibility of her version of events. In this regard, "`[I]t is not error to comment on the failure of the defense to produce evidence on a phase of the defense upon which the defendant seeks to rely.'" Fields, supra at 111, n. 21, 538 N.W.2d 356, quoting United States v. Bright, 630 F.2d 804, 825 (C.A.5, 1980). Accordingly, we conclude that the questioning at issue did not improperly shift the burden of proof, but rather was proper because it directly challenged the credibility of testimonial evidence elicited by the defense in support of its theory of the case.

C. Prosecutorial Closing Argument
Defendant argues that the prosecutor improperly shifted the burden of proof during rebuttal argument by referring to the absence of a blood sample from defendant's wife. This issue was not preserved below, but, even if it had been, we would find the argument at issue to have been proper. The remark at issue was made in connection with the issue whether the soiled tissues in the basement were related to sexual activity between defendant and defendant's wife. However, as stated by the Supreme Court in Fields, supra at 115, 538 N.W.2d 356:
[W]here a defendant ... advances, either explicitly or implicitly, an alternate theory of the case that, if true, would exonerate the defendant, comment on the validity of the alternate theory cannot be said to shift the burden of proving innocence to the defendant. Although a defendant has no burden to produce any *778 evidence, once the defendant advances evidence or a theory, argument on the inferences created does not shift the burden of proof.
Also, a prosecutor may argue from the evidence that a witness is unworthy of belief. People v. Howard, 226 Mich.App. 528, 548, 575 N.W.2d 16 (1997). Thus, the prosecutor properly responded to the defense presentation of testimony from defendant's wife in relation to the soiled tissues by questioning her credibility in light of her resistance to providing a blood sample.

V. Jury Instruction
Defendant argues that the trial court's instruction to the jury regarding the CSC I count alleging that defendant performed fellatio on the complainant improperly allowed conviction of that charge without a finding of penetration. While we agree that the instruction at issue was erroneous and this issue was preserved below, it does not constitute error requiring reversal because the error was harmless beyond a reasonable doubt.
The trial court instructed the jury with regard to the pertinent CSC I count that the prosecution had to prove, in part, beyond a reasonable doubt "that the Defendant engaged in a sexual act that involved... the touching of [the complainant's] genital organs with the Defendant's mouth or tongue."
"Sexual penetration" is an essential element of any charge of CSC I. M.C.L. § 750.520b(1); MSA 28.788(2)(1). Sexual penetration is statutorily defined for purposes of CSC I (and CSC III) in M.C.L. § 750.520a(I); MSA 28.788(1)(I) as
sexual intercourse, cunnilingus, fellatio, anal intercourse, or any other intrusion, however slight, of any part of a person's body or of any object into the genital or anal openings of another person's body, but emission of semen is not required. [Emphasis supplied.]
The instruction at issue was erroneous in indicating that a mere touching of the complainant's male genital organs by defendant's mouth or tongue would be "fellatio" that, together with other elements, would constitute CSC I. Rather, in People v. Johnson, 432 Mich. 931, 442 N.W.2d 625 (1989), the Michigan Supreme Court in considering an appeal from a decision of this Court summarily adopted Judge Michael Kelly's dissenting opinion in People v. Johnson, 164 Mich.App. 634, 646-649, 418 N.W.2d 117 (1987), in which Judge Kelly concluded that, at least for purposes of the CSC I statute, "fellatio" does not consist merely of "any oral contact with the male genitals," but rather requires entry of a penis into another person's mouth.
However, assuming that this error is of constitutional magnitude, it does not entitle defendant to relief because it was harmless beyond a reasonable doubt. People v. Graves, 458 Mich. 476, 482, 581 N.W.2d 229 (1998); People v. Anderson (After Remand), 446 Mich. 392, 404-406, 521 N.W.2d 538 (1994) ("nonstructural" constitutional error that occurs during the presentation of a case to the jury does not require reversal if the reviewing court is satisfied the error was harmless beyond a reasonable doubt). The complainant testified that his penis entered defendant's mouth, while the defense theory was that defendant did not engage in any sexual abuse of the complainant whatsoever. There was no evidence presented at trial that would reasonably support a conclusion that defendant engaged in oral contact with the complainant's genitals without actually committing fellatio. Thus, the trial court's erroneous instruction regarding the type of physical conduct necessary to establish the CSC I count at issue was harmless beyond a reasonable doubt. See People v. Yarger, 193 Mich.App. 532, 534-535, n. 1, 485 N.W.2d 119 (1992) (erroneous reference to "touching" with regard to an analogous charge held harmless given the nature of the allegation and the defendant's denial of any type of penetration).

VI. Other Allegations of Prosecutorial Misconduct

A. Questioning About Defendant's Invocation of Miranda Rights
Defendant argues that the prosecution improperly elicited testimony at trial from Detective David Walters that defendant invoked *779 his Miranda[7] rights. This issue was not preserved below. We decline to reach this unpreserved issue, which we consider unimportant because it is unlikely to have affected the outcome of the trial. People v. Morey, 230 Mich.App. 152, 163, 583 N.W.2d 907 (1998).

B. Alleged Improper Argument
Finally, asserting a claim of error that was preserved by objection below, defendant argues that the prosecutor shifted the burden of proof during his closing argument by referring to the failure of the defense to produce a telephone bill that may have either confirmed or contradicted a portion of the complainant's testimony. Evidently, the prosecutor was questioning why this was not done during defense counsel's direct examination of defendant's mother. We assume without deciding that the prosecutorial remark at issue improperly criticized the defense for failing to present proofs on this point. See Fields, supra at 117, 538 N.W.2d 356 (providing as a partial explanation of why the prosecutorial cross-examination at issue in that case was proper because the prosecutor had not suggested that the defendant had a duty to produce an alleged witness). However, assuming without deciding that this implicated defendant's federal and state constitutional rights against self-incrimination, we conclude that any possible error in this regard does not require reversal, because it was harmless beyond a reasonable doubt in light of the highly inconsequential nature of the matter, which related to whether the complainant had telephoned his mother at about 11:30 p.m. on the night of the incidents. Graves, supra; Anderson, supra. Thus, defendant is not entitled to relief based on this issue.
Affirmed.
NOTES
[1]  The complainant testified that his birthdate was October 8, 1978, which would have made him fifteen years old on the night of the incident. However, the complainant referred to himself as being age fourteen on the night of the incident at another point in his testimony. In any event, it is unimportant to the issues on appeal whether the complainant was fourteen or fifteen years old on the night of the incident. The portion of the CSC I statute underlying defendant's convictions, M.C.L. § 750.520b(1)(b); MSA 28.788(2)(1)(b), is applicable to certain acts of sexual penetration with a victim who "is at least 13 but less than 16 years of age."
[2]  The count of which defendant was acquitted alleged that defendant anally penetrated the complainant.
[3]  Following this point, complainant's testimony is, of necessity, quite graphic. While we regret having to include this testimony at any length, we reluctantly do so because it is central to the charges against defendant.
[4]  Thus, the sufficiency of the evidence to support the first two elements, related to the occurrence of sexual penetration and the complainant's age, is not at issue. In any event, there was plainly sufficient evidence to support the jury's finding of those two elements.
[5]  We note that the recognition in Regts and Premo that coercion for purposes of CSC cases extends to situations that do not involve the accomplishment of sexual contact or sexual penetration by raw physical force or threats of physical violence is consistent with the statutory language of M.C.L. § 750.520b(1)(f); MSA 28.788(1)(f), which provides in part:

Force or coercion includes but is not limited to any of the following circumstances:
* * * * * *
(iv) When the actor engages in the medical treatment or examination of the victim in a manner or for purposes which are medically recognized as unethical or unacceptable. [Emphasis supplied].
In expressly including such unethical conduct by medical personnel as an example of force or coercion, the CSC I statute reflects that coercion for purposes of that statute extends far beyond the direct use of raw physical force or threats of physical violence.
[6]  Regts and Premo each involved fourth-degree criminal sexual conduct (CSC IV) convictions. Regts, supra at 295, 555 N.W.2d 896; Premo, supra at 407, 540 N.W.2d 715. However, the meaning of "coercion" under the CSC I statute, M.C.L. § 750.520b; MSA 28.788(2), is identical to the meaning of "coercion" under the CSC IV statute, M.C.L. § 750.520e; MSA 28.788(5), because the latter statute describes "coercion" by reference to the former. MCL 750.520e(1)(a); MSA 28.788(5)(1)(a). Thus, the discussion of conduct that constitutes coercion in Regts and Premo is just as controlling in this CSC I case as it would be in a CSC IV case.
[7]  Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966).
