Missing scene in school?

I saw this movie in a theater shortly after it was released. I could have sworn there was a scene where Joe had sex with a girl on the floor of a bathroom. I don't remember if it was the same girl as in the movie scene, but the episode I remembered happened later, at school and not in the theater. The two had full intercourse that lasted well under a minute. It was a brusque, impersonal encounter that allowed Joe to sate his teenage lust as quickly as possible with no regard for his partner -- the proverbial wham, bam, thank you ma'am.

Over the years, I've seen VHS and DVD copies of the film, and I just watched the new Blu-Ray. The scene is never there. Did I dream it? Remember it from something else?