S for Sex (1971)

A coming of age story; Philippe, a photography enthusiast, spends a holiday in the country estate of her aunt Nadia. She gives a camera to him, which he uses to take pictures of her in very imminent moments. Phillpe's lust for his aunt has driven him to put a scheme together to use the French maid Chantal to lure his uncles attentions away from Nadia to Chantal. Philipe spying through key holes, taking pictures of the unaware Nadia while dressing, convincing Chantal to pose nude for him, and using the pictures to spark his uncle's interest, finally comes to a climax. His plot works and he wins his prize!!.