EDITH BROWN CLEMENT, Circuit Judge:

After a jury trial, Andrea Lewis was convicted of three counts of violating 18 U.S.C. § 2423(a) by transporting persons under the age of 18 years across state lines with the intent that they engage in criminal sexual activity. He appeals the district court's admission of evidence that he committed uncharged sexual assaults against minors. We AFFIRM.

FACTS AND PROCEEDINGS

Lewis was the director of a choir group that included both adults and minors.1 He had sexual relationships with the three named victims, all of whom were underage members of his choir group during the mid- to late-1990s. He had sex with each of the three girls for the first time when they were approximately fourteen years old, which is below the age of consent under federal, Louisiana, and Texas law. He did not use physical force against the girls to have sex with them, however. He had intercourse and oral sex with them many times while they were underage, and he continued his sexual relationship with two of the girls into their twenties.

The federal charges against Lewis related to his transportation of the three then-minor girls across state lines from Louisiana to Texas with the intent of having illegal sex with them. While Lewis's trips also generally involved the rest of the choir group, the government maintained that having sex with the minors was one reason that he transported them across state lines. Lewis's defense was that he did not have sex with any of the girls when they were underage, let alone transport them across state lines to have sex with them.

Before the trial, the government filed a motion in limine asking the court to admit evidence under Federal Rule of Evidence 413,2 to show that Lewis had committed other sexual assaults against minors.3 The government's evidence would show that Lewis had forced one fourteen-year-old girl, A.D., to have oral sex with him and had attempted to force her to have vaginal sex with him. He also sexually molested her by touching her vagina and breasts.4 The government's motion also gave notice of intent to introduce evidence that Lewis had sexually abused another girl, S.H., who was a member of his church and choir group. Specifically, he started molesting her when she was around eight years old. He had sex with her when she was four-teen.5

The district court deferred ruling on the government's pretrial motion in limine. After the jury was empanelled, and outside of its presence, the district court held a hearing to decide whether the evidence was admissible. Lewis objected to its admission, arguing, among other things, that admitting the evidence would violate Rule 403 (i.e., its probative value was substantially outweighed by the danger of unfair prejudice). The district court ruled that the evidence was admissible. Lewis now appeals, arguing that the admission of the Rule 413 evidence was an abuse of discretion under Rule 403 because the uncharged conduct is more serious than the charged conduct.

STANDARD OF REVIEW

When an evidentiary objection has been properly preserved, it is ordinarily reviewed for abuse of discretion. United States v. Dillon, 532 F.3d 379, 387 (5th Cir.2008). A district court's ruling regarding Rule 403 is reviewed "with an especially high level of deference to the district court, with reversal called for only rarely and only when there has been a clear abuse of discretion." Id. (internal quotation marks omitted). An unpreserved error is reviewed for plain error. United States v. Escalante-Reyes, 689 F.3d 415, 418 (5th Cir.2012) (en banc).

The parties dispute whether Lewis preserved his argument. We agree with the government that Lewis did not preserve the argument because he failed to raise it below.6 To preserve error, an evidentiary objection must "state[ ] the specific ground, unless it was apparent from the context." Rule 103(a)(1)(B). "Rulings on evidence cannot be assigned as error unless ... the nature of the error was called to the attention of the judge, so as to alert him to the proper course of action and enable opposing counsel to take proper corrective measures." Fed.R.Evid. 103(a) advisory committee's note to 1972 proposed rule; accord Calcasieu Marine Nat'l Bank v. Grant, 943 F.2d 1453, 1459 (5th Cir.1991). "A loosely formulated and imprecise objection will not preserve error." United States v. Polasek, 162 F.3d 878, 883 (5th Cir.1998). "Rather, a trial court judge must be fully apprised of the grounds of an objection." Id.

Below, Lewis argued that the uncharged conduct should not be admitted under Rule 403 because it was intrastate rather than interstate and because its introduction might confuse the jury.7 But he never presented the argument he raises on appeal, which is that the uncharged conduct was inadmissible because it involved forcible sexual assaults and so was more serious than the charged conduct involving statutory sexual assaults. Lewis points to nothing in the record that would have apprised the district court of this non-obvious argument. Indeed, by making specific arguments about Rule 403, Lewis left the impression that he was putting forward his best Rule 403 argument. There was no reason for the district court to brainstorm additional ways in which the uncharged evidence might be substantially more unfairly prejudicial than probative. Further, if Lewis had raised his present argument below, the district court could have considered whether to exercise its considerable discretion by disallowing some or all of the uncharged victims' testimony.8 For example, the court could have instructed the uncharged victims to omit details about Lewis's use of force against them.

We conclude that Lewis failed to fully apprise the court of the grounds of his objection or to alert it to the proper course of action. Accordingly, this error was unpreserved, and plain error review applies. Under plain error review, Lewis must show that (1) the district court erred, (2) the error was clear or obvious, (3) the error affected his substantial rights, and (4) this court should exercise its discretion to correct the error because "the error seriously affects the fairness, integrity, or public reputation of judicial proceedings." Escalante-Reyes, 689 F.3d at 419 (internal quotation marks and alteration omitted).

DISCUSSION

Rule 413 provides that "[i]n a criminal case in which a defendant is accused of a sexual assault, the court may admit evidence that the defendant committed any other sexual assault." Rule 413(a).9 "The evidence may be considered on any matter to which it is relevant." Id. But this evidence "is still subject to the Rule 403 balancing test." Dillon, 532 F.3d at 387. Rule 403 provides that a court "may exclude relevant evidence if its probative value is substantially outweighed by a danger of ... unfair prejudice." An "alleged sexual assault does not need to have been identical" to the charged sexual assault for it "to be admissible, but aspects of the assault must have sufficient probative value as to some element of the charged offense to not be substantially outweighed by its danger of unfair prejudice." Dillon, 532 F.3d at 389. For example, an uncharged nonconsensual sexual assault can be used to show a defendant's proclivity for committing nonconsensual sexual assaults. Id.10 Similarly, in a case involving possession and receipt of child pornography, evidence of child molestation is admissible because it tends to show a defendant's sexual interest in children. United States v. Moore, 425 Fed.Appx. 347, 352 (5th Cir.2011) (per curiam) (unpublished).

Here, the evidence that Lewis had sex with two additional underage girls was highly probative of his proclivity for having sex with underage girls. A proclivity for having sex with underage girls made it significantly more likely that he transported the named victims across state lines with the intent that they engage in criminal sexual activity, which was an element of 18 U.S.C. § 2423(a), the charged crime.11

Further, in response to a question about whether Lewis had oral sex with one of the named victims, Lewis testified, "I don't like oral sex.... So, no, I don't like people to do oral sex." A.D.'s testimony that he forced her to have oral sex multiple times was probative for impeaching Lewis's testimony that he did not like oral sex, which supported the named victim's testimony that she had performed oral sex on him.

The Rule 413 evidence also showed Lewis's modus operandi in the selection of his victims. Each victim, whether charged or uncharged, was a member of his choir group, showing how he gained access to his victims. Further, each of the girls testified to first having intercourse or oral sex with Lewis when they were approximately fourteen years old (although he sexually assaulted S.H. in other ways when she was younger). Even though the modus operandi for the charged and uncharged offenses do not match perfectly, the substantial overlap makes the uncharged offenses probative. See United States v. Hitt, 473 F.3d 146, 159 (5th Cir. 2006) ("[M]odus operandi evidence is relevant to whether sexual activity occurred between the defendants and [the named victim], which is relevant to whether the defendants had the requisite intent to engage in illicit sexual activities across state lines.").

The high probative value of this Rule 413 evidence must be "substantially out-weighed by a danger of ... unfair prejudice." Rule 403 (emphasis added). Lewis may be right that evidence of forcible sexual assaults on underage girls is more prejudicial than evidence of so-called "consensual" sex with fourteen- to sixteen-year-old girls. But when we upheld the admission of child molestation evidence in a child pornography case over a Rule 403 challenge, we did not raise any concern that some might view child molestation as a more serious crime than possession and receipt of child pornography. See Moore, 425 Fed.Appx. at 352. Moreover, any potential for unfair prejudice here was mitigated by the district court's careful instruction to the jury that "[y]ou are here to decide whether the government has proved beyond a reasonable doubt that the defendant is guilty of the crimes charged. The defendant is not on trial for any act, conduct, or offense not alleged in the indictment[.]" The district court also pointed out that the "alleged illegal sexual conduct involving" S.H. and A.D. was not charged in the indictment. "A jury is presumed to follow its instructions." Weeks v. Angelone, 528 U.S. 225, 234, 120 S.Ct. 727, 145 L.Ed.2d 727 (2000). The district court's instructions therefore cut against finding unfair prejudice here.

We conclude that the district court did not clearly abuse its discretion by implicitly holding that the high probative value of the evidence was not substantially out-weighed by the danger of unfair prejudice. This is simply not the kind of rare case warranting reversal of a district court's Rule 403 analysis. See Dillon, 532 F.3d at 387 (holding that Rule 403 analysis is reviewed "with an especially high level of deference to the district court, with reversal called for only rarely and only when there has been a clear abuse of discretion" (internal quotation marks omitted)). Thus, the court did not err, let alone clearly or obviously err, and we need not reach the other prongs of the plain error standard of review.12

CONCLUSION

For the foregoing reasons, we AFFIRM.