OPINION
COOK, Circuit Judge.Danny Campbell appeals his convictions for receipt and possession of child pornography in violation of 18 U.S.C. § 2252(a)(2)1 and (4)(B),2 arguing that the *534district court (1) denied him his right to present a defense; (2) erred in denying his motion for acquittal; (3) erred in its instructions to the jury; and (4) erred in denying him a reduction in his offense level for acceptance of responsibility. Because we find Campbell’s arguments unavailing, we AFFIRM his conviction and sentence.
I. Factual and Procedural Background
Acting on a tip, police seized two three-ring binders containing 112 images of nude or partially nude children from Campbell’s place of employment in May of 2001. Campbell told police that he downloaded them from various websites. The police arrested Campbell and a grand jury indicted him for one count each of receiving and possessing child pornography shipped and transported in interstate commerce.
At trial, Campbell moved for judgment of acquittal at the close of the government’s case-in-chief, arguing that the government presented no evidence showing he intended to possess any illegal images. The district court granted the motion with respect to sixty-six of the images, concluding that as a matter of law, those images were not “lascivious” and could not support a conviction under § 2252. But the court ruled that the government presented sufficient evidence to allow the jury to consider the remaining images.
Campbell’s principal defense then, was that while those images contained nude or partially nude minors, he did not know they were engaged in sexually explicit conduct and therefore he did not violate § 2252. Essentially, Campbell wanted to show that he thought the pictures were artistic-the district court described it as a “kind of Michelangelo defense.” To support this defense, Campbell sought to present testimony from Lendon Noe, an art professor who would have testified about well-regarded artists who use nude or partially nude children as subjects in their work. The district court disallowed Noe’s testimony because Campbell failed to disclose her as an expert witness.
Later, Campbell sought to use in his closing argument those sixty-six images that the district court concluded were not lascivious as a matter of law. But the court refused his request, finding that the images would prejudice Campbell himself. The court also overruled Campbell’s objection to the jury instruction.
The jury found Campbell guilty of both receiving and possessing the sexually explicit images in violation of § 2252. At his sentencing, Campbell requested a three-point reduction in offense level under U.S.S.G. § 3E1.1 for acceptance of responsibility. The court denied that request and sentenced Campbell to forty months for each offense, to be served concurrently.
II. Discussion
A. Campbell’s Right to Present a Defense
Campbell argues that by excluding Professor Noe’s testimony and disallowing defense counsel’s use of the sixty-six nonlaseivious images for his closing argument, the district court denied him his right to present a defense. We review a district court’s evidentiary rulings for abuse of discretion. Gen. Elec. Co. v. Joiner, 522 U.S. 136, 141, 118 S.Ct. 512, 139 L.Ed.2d 508 (1997).
The right of the accused to present a defense inheres in the Fifth Amendment’s guarantee of due process and the Sixth *535Amendment’s Compulsory Process Clause. Taylor v. Illinois, 484 U.S. 400, 410, 108 S.Ct. 646, 98 L.Ed.2d 798 (1988); Washington v. Texas, 388 U.S. 14, 19, 87 S.Ct. 1920, 18 L.Ed.2d 1019 (1967). Presenting relevant evidence is part of that right. United States v. Scheffer, 523 U.S. 303, 308, 118 S.Ct. 1261, 140 L.Ed.2d 413 (1998). But the right to present relevant evidence is not boundless. Id. It “may, in appropriate cases, bow to accommodate other legitimate interests in the criminal trial process.” Rock v. Arkansas, 483 U.S. 44, 55, 107 S.Ct. 2704, 97 L.Ed.2d 37 (1987) (quoting Chambers v. Mississippi, 410 U.S. 284, 295, 93 S.Ct. 1038, 35 L.Ed.2d 297 (1973)). A defendant’s noncompliance with “established rules of procedure and evidence designed to assure both fairness and reliability in the ascertainment of guilt or innocence” may prompt a court to curtail the right to present relevant evidence. Chambers, 410 U.S. at 302. Excluding relevant evidence for failure to comply with such rules does not violate an accused’s right to present a defense so long as those rules are not “ ‘arbitrary’ or ‘disproportionate to the purposes they are designed to serve.’ ” Scheffer, 523 U.S. at 308 (citation omitted).
Here, in excluding Noe’s testimony, the district court applied one of those rules: Fed.R.Crim.P. 16(b)(1)(C), concerning reciprocal discovery of expert witnesses.3 Campbell’s request for discovery from the government, and the government’s compliance, obligated him to disclose any expert witnesses he intended to present.4 Campbell does not claim that he properly disclosed this witness. Nor does he claim that enforcing Rule 16 here is “arbitrary” or “disproportionate” to its intended purpose. Instead, he argues that Professor Noe was a lay witness, not an expert and therefore not subject to the dictates of Rule 16(b)(1)(C).
The Federal Rules of Evidence allow a witness to be “qualified as an expert by knowledge, skill, experience, training, or education.” Fed.R.Evid. 702. As an art professor asked to testify about child nudity as art, Noe fit the bill. The defense sought to offer her insight about the professional art world, not her knowledge regarding Campbell’s case. Thus the district court acted within its discretion to remedy Campbell’s Rule 16(b)(1)(C) failure-to-diselose violation by excluding Noe’s testimony under Fed.R.Crim.P. 16(d)(2)(C).
Second, the district court acted within its discretion in denying Campbell’s request to use in his closing argument those images excluded by the court as nonlascivious. A court may limit a defendant’s right to present relevant evidence when necessary to further “other legitimate interests of the criminal trial process.” Scheffer, 523 U.S. at 308. One such interest is the court’s duty to protect *536the jury from “the influence of passion and prejudice, and to assure to the litigants a fair and impartial trial.” Hockaday v. Red Line, 174 F.2d 154, 156 (D.C.Cir.1949) (citation omitted).
In its sound discretion, the district court could have determined that protection of Campbell’s trial rights necessitated this evidentiary ruling. Danger of prejudice to Campbell inhered in what the jury might have surmised upon learning that the judge had excluded some images but not others. Reasoning by implication, the jury might well have concluded that since the court eliminated certain images from jury consideration as nonlascivious, those that remained were lascivious.
B. Campbell’s Motion for Acquittal
Next, Campbell argues that the district court erred in denying his Rule 29 motion for acquittal. See Fed. R.Ceim. P. 29. When we review the denial of a motion for acquittal, “the relevant question is whether, after viewing the evidence in the light most favorable to the prosecution, any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt.” Jackson v. Virginia, 443 U.S. 307, 319, 99 S.Ct. 2781, 61 L.Ed.2d 560 (1979). Campbell claims that the government presented insufficient evidence for a reasonable trier of fact to find that the images contained sexually explicit conduct, an essential element of an 18 U.S.C. § 2252 offense.
For purposes of § 2252, “sexually explicit conduct” means “lascivious exhibition of the genitals or pubic area of any person.” 18 U.S.C. § 2256(2)(A)(v). In determining whether a particular exhibition of the genitals or pubic area was “lascivious,” several of our sister circuits have used the six factors outlined in United States v. Dost, 636 F.Supp. 828, 832 (S.D.Cal.1986). See, e.g., Doe v. Chamberlin, 299 F.3d 192, 196 (3d Cir.2002); United States v. Amirault, 173 F.3d 28, 32-35 (1st Cir.1999); United States v. Wolf, 890 F.2d 241, 244-46 (10th Cir.1989); United States v. Rubio, 834 F.2d 442, 448 (5th Cir.1987).
Those factors are: (1) whether the focal point of the visual depiction is on the child’s genitalia or pubic area; (2) whether the setting of the visual depiction is sexually suggestive, i.e., in a place or pose generally associated with sexual activity; (3) whether the child is depicted in an unnatural pose, or in inappropriate attire, considering the age of the child; (4) whether the child is fully or partially clothed, or nude; (5) whether the visual depiction suggests sexual coyness or a willingness to engage in sexual activity; and (6) whether the depiction is intended or designed to elicit a sexual response in the viewer. Dost, 636 F.Supp. at 832. We note that this list is not exhaustive, and an image need not satisfy every factor to be deemed lascivious. Id. Rather, along with any other relevant criteria, including the age of the child, these factors provide a framework for analyzing the image in its entirety. Id.
Using this framework then, we conclude that a rational juror could have found that Campbell’s images depicted “sexually explicit conduct”-that is, a “lascivious exhibition of the genitals or pubic area....” 18 U.S.C. § 2256(2)(A)(v). Campbell’s pictures contained images of preadolescent to teenage girls, most of whom are completely nude. Those not completely nude are found wearing lingerie or stockings and garters-inappropriate attire for girls of their age. Many of the depictions are sexually suggestive, with girls posing unnaturally, prompting focus on the genital area. Moreover, most of the images seem intended to elicit a sexual response in the viewer. That intent is evidenced by how the child poses (on her back with legs slightly spread), the angle of the shot (taken from near the child’s feet, while she is lying on her back), and the child’s facial *537expression (smiling while looking into the camera). These same characteristics support a finding that the images suggest a sexual coyness or willingness to engage in sexual activity. In short, Campbell’s images involved all of the Dost factors to some extent, and a rational juror could have found beyond a reasonable doubt that they depicted sexually explicit conduct.
C. The Jury Instruction
Third, Campbell argues that the district court erred in refusing to deliver his proposed jury instruction. He claims that the court’s instruction was constitutionally infirm because it failed to require a finding that the defendant knew the images contained a “lascivious exhibition of the genital or pubic area.”
“We review jury instructions as a whole to determine whether they fairly and adequately submitted the issues and applicable law to the jury.” United States v. Williams, 952 F.2d 1504, 1512 (6th Cir.1991). We will reverse a district court’s refusal to deliver a requested instruction “only if that instruction is (1) a correct statement of the law, (2) not substantially covered by the charge actually delivered to the jury, and (3) concerns a point so important in the trial that the failure to give it substantially impairs the defendant’s defense.” Id.
Campbell asked the court to instruct the jury as follows:
In order for you to find the defendant guilty of either count, the government must have proved to you beyond a reasonable doubt that Mr. Campbell knew the photographs were of minors -i.e., under the age of 18- and that he knew beyond a reasonable doubt that the photographs were of sexually explicit conduct.
J.A. at 128.
Because Campbell’s requested instruction incorrectly stated the law, the district court properly rejected it. Campbell’s version would have required the jury to find that Campbell knew beyond a reasonable doubt that the photographs were of sexually explicit conduct. The correct charge-which the district recited-instructed that the jury must find beyond a reasonable doubt that Campbell knew that the depiction was a minor engaged in sexually explicit conduct.
D. Sentencing
Finally, Campbell argues that the district court erred in denying his request for a three-point reduction in offense level for acceptance of responsibility. A district court’s determination of acceptance of responsibility is a factual finding, and when considering a defendant’s sentence under the guidelines, we review the district court’s factual findings for clear error. E.g., United States v. Lutz, 154 F.3d 581, 589 (6th Cir.1998); United States v. Clements, 144 F.3d 981, 982 (6th Cir.1998).
Section 3E1.1 of the Sentencing Guidelines awards a reduction of two points “[i]f the defendant clearly demonstrates acceptance of responsibility for his offense.” U.S.S.G. § 3El.l(a). An additional point may be deducted if the defendant pleads guilty. U.S.S.G. § 3El.l(b). Because Campbell did not plead guilty, we need only consider whether the district court clearly erred by denying him the § 3El.l(a) two-point reduction.
We conclude that the district court did not clearly err. Campbell argues that his offense level should have been reduced because he never denied that he possessed or received the images of girls in various states of undress. But he did argue his innocence, claiming that he did not know the images contained sexually explicit conduct. Thus he put the government to its burden of proving all of the essential elements of the crime.
*538We have held that the § 3El.l(a) reduction is “ ‘not intended for a defendant who puts the government to its burden of proof at trial by denying the essential factual elements of guilt, is convicted, and only then admits guilt and expresses remorse.’ ” United States v. Hill, 167 F.3d 1055, 1071 (6th Cir.1999) (quoting U.S.S.G. § 3E1.1 cmt. n. 2). The district court determined that Campbell did not merit this reduction because he denied his guilt and forced the government to obtain a jury verdict on the elements of the crime. We find no clear error by the district court in denying Campbell this two-point reduction.
III. Conclusion
For the all of the foregoing reasons, we affirm Campbell’s conviction and sentence.
. The statute criminalizes the receipt of child pornography by “[a]ny person” who:
(2) knowingly receives, or distributes any visual depiction that has been mailed, or has been shipped or transported in interstate or foreign commerce, or which contains materials which have been mailed or so shipped or transported, by any means including by computer ... if— (A) the producing of such visual depiction involves the use of a minor engaging in sexually explicit conduct; and (B) such visual depiction is of such conduct;
. The statute also criminalizes the possession of child pornography by ”[a]ny person” who:
(B) knowingly possesses 1 or more books, magazines, periodicals, films, video tapes, or other matter which contain any visual depiction that has been mailed, or has been shipped or transported in interstate or foreign commerce, or which was produced using materials which have been mailed or so shipped or transported, by any means including by computer, if— (i) the producing of such visual depiction involves the use of a minor engaging in sexually explicit conduct; and
*534(ii) such visual depiction is of such conduct; ... 18 U.S.C. § 2252(a).
. Rule 16(b)(1)(C) provides for the discovery of expert witnesses:
(C) Expert Witnesses.-The defendant must, at the government’s request, give to the government a written summary of any testimony that the defendant intends to use under Rules 702, 703, or 705 of the Federal Rules of Evidence as evidence at trial, if-
(i) the defendant requests disclosure under subdivision (a)(1)(G) and the government complies; or
(ii) the defendant has given notice under Rule 12.2(b) of an intent to present expert testimony on the defendant's mental condition.
This summary must describe the witness’s opinions, the bases and reasons for those opinions, and the witness’s qualifications.
Fed. R.Crim. P. 16(b)(1)(C).
. The record shows that Campbell filed a “Rule 16 Discovery Request” on September 28, 2001, and that the government complied with this request on October 3, 2001. J.A. at 4.