Identify this film (possible spoilers (not in OP) and sexual content)

I’m trying to figure out which film this half-remembered scene is from.

IIRC the setting is a frat party. A couple is going at it on a bed, doggie style. Both are drunk. Later in the film we learn they were having anal sex for the first time. Suddenly the guy vomits on the woman’s back.

Sorry I don’t have more to go on.

Sounds like a scene described in the book I Hope They Serve Beer in Hell.

He’s trying anal for the first time and she defecates in the middle of it and he vomits all over her.

They made a movie out of the book and that scene may have been in it. I haven’t seen the film, so I’m not sure.

(Great book though!)

Rules of Attraction

Snow White?

I think that’s it. Thanks!

That’s just all kinds of wrong. Hilarious, but still wrong.

Wally Wood’s Snow White … .

When is that? I’ve seen several references to that scene as anal but I always thought they were wrong assumptions. Do they actually reference it in the movie itself?

In my pretty vague memory of the movie, the girl was a virgin, and it was her first time having sex of any sort. I don’t remember anything about anal sex.

Yeah, that’s exactly how I remember it.

Wasn’t the guy also not the person she thought she was having sex with, but some random guy who switched places when she wasn’t looking?

I remembered too much. That’s mentioned in the commentary and apparently was set up in a deleted scene. And yes. The film student who she thought she was going to get together with winds up videotaping her getting raped by a townie.