Derrière le miroir sans tain (1982)

"Derrière le miroir sans tain" is a 1982 movie directed by Jean-Claude Roy and starring by Cathy Ménard, Carole Piérac. Sam is an author. His publisher wants him to write an erotic book. Unfortunately he has no imagination. To get some stimulation he watches a porn video together with his wife Agnes. Agnes's girlfriend Francoise joins them and describes an amorous adventure she has experienced recently...