Pretty Maids all in a Row (1971)

Shocking at the time of its creation--the dawn of the sexual revolution--and perhaps even more unthinkable today, this bawdy black comedy was written by Gene Roddenberry, creator of Star Trek, and directed by legendary erotic film king Roger Vadim. Rock Hudson, Angie Dickinson, Telly Savalas, Roddy McDowall, Keenan Wynn, and James Doohan star in the story of a young man's first sexual explorations, which are threatened by a string of murders. In a California high school, a married coach and faculty advisor beds his female students and eventually has to kill several of them to keep them quiet. Ponce de Leon Harper (John David Carson), who is starting to get neurotic and suffer academically because of his lack of sex, lusts after his sexy new substitute teacher, who soon takes care of his problem.