Private School (film)

Private School also titled Private School ... for Girls is a 1983 teen oriented sex comedy film, directed by Noel Black. Starring Phoebe Cates, Betsy Russell and Matthew Modine, it follows a teenage couple attempting to have sex for the first time.

About a week later, at a coed dance, Chris reveals that Jim is her boyfriend as the couple are dancing, Chris tells Jim that shes decided she wants to surrender her virginity to him. After a speech by headmistress Miss Dutchbok Fran Ryan, the band plays a slow song while Jordan dances alone and conspires against Chris. Bubba, sporting an erection from Miss Dutchboks speech, sneaks off to the headmistress office with Betsy to drink and have sex however, the two are caught in the act by the headmistress and her friends. The following day, after morning aerobics, Chris books a hotel for herself and Jim.After another period of time, students of the two schools are horseriding together. Jordan trots past where Chris and Jim are talking and flashes her breasts at Jim. In revenge, Betsy steals Jordans shirt, forcing the latter to horseride nude in front of the headmistress et alumni. That weekend, Jim goes to buy condoms but is distracted by the pharmacist Martin Mull in an uncredited role and ends up buying dental hygiene products when Chris goes to buy the protection herself, she is distracted and eventually seen by Miss Dutchbok. ........

Source: Wikipedia