I remember watching a film from the 80's when I was a teen. It was pretty much the poor man's Fast Times at Ridgemont High. But the girl in the film was a virgin and her friend was slutty and always coming on to her dad.

Somehow the whole school gets duped into thinking that the virgin was sleeping around. At one point a punk girl goes up the the virgin and says "I know you are experienced in this, so I thought I'd ask you what kind of birth control you use." The virgin responds "I don't know because I don't do anything that would require birth control." and the punk girl responds "Just like I thought, oral sex!"

I don't know why I remember that line all these years later, but what is that film?