Secretaires Sans Culotte
Richard Lemieuvre is a dentist in Paris. His niece (Barbara Moose) comes to visit and he hires a private detective (Dominique Aveline) to keep a watch on her. Martine works as his receptionist at first and spies on him having sex with a patient (Brigitte Lahaie) who, at the end of the session inserts love balls inside herself. Martine copies this when she goes off to a shoe shop (she also seems to be working there) where Liliane Lemieuvre is a customer (non-sex). Martine has sex with the shop assistant, who notices her playing with herself...