Teenage Playmates (1974)

A bunch of lovely teenage schoolgirls work at a secret brothel where they have sex with high paying older men. After the girls all get arrested for prostitution, several of them discuss how they wound up working at said brothel: Helga gets guys to do her homework in exchange for sex, an ice cream parlor waiter promises three gals free ice cream if they all have sex with him, enticing hitchhiker Monika lures men to a remote barn so she can rob them of their money, brainy virgin Karla convinces her father's business partner to deflower her, an uptight Prussian teacher encounters rowdy Bavarian students in his classroom, and smitten student Gaby pretends to be her mother so she can make love to a teacher she has a crush on.