Klassenziel: Sex (1995)

This Magma-classic is set in a boarding school where the girls (and the teachers) only crave one thing: risqué sex! The film opens as a "thief" enters the girls' dormitory and fumbles a sleeping chick. She doesn't even wake up when he starts to fuck her and cums all over her hair! This is not really a realistic scene but it sure is a cool sexual fantasy. In another scene, a teacher explains to his class what the difference between a limp and a hard cock is. To illustrate what a stiff cock looks like he summons a school girl to the front to help him out. This is another scene that really triggers the sexual imagery in your mind. There's no sex in that scene but it gets you going because it stimulates your dirty fantasies. This film really delivers the right amounts of hardcore sex and erotic imagery.