French Finishing School(1979)

Viva la erotique! A French finishing school is where young girls go to complete their education but in domestic and social skills rather than academics. In short, it's where they learn to be girls who behave like women. Samantha (Desiree Cousteau) is obviously an "A" student, because she secretly photographs one of her teachers, a handsome stud named Eric, in bed with one of his students. Armed with this scandalous blackmail, she proceeds to turn him into her private but vengeful love slave.