I don't know. Honestly, I don't. I think it seriously would come down to what context that issue was brought up, how good the prosecution is vs. the defense attorneys (both supplied by the Crown, presumably. Unless one or more of the accused male youths are wealthy enough to obtain his own legal counsel), and how the issue is presented to the judge and jury.

But I can certainly seeing it played to the accused favour by the counsel saying something along the lines of: "She was drunk enough that during consensual intercourse, she threw up."

Thereby sidelining that issue for pretty much the rest of the trial. Even if it's ever brought up again, in the Jury's minds, it wouldn't necessarily have the negative connotation that you're envisioning.