Smoker (1983)

Madame Suque is a leftist revolutionary whose sex boutique serves as very effective cover. But now she's blown it big time. One of the vibrators in her shop contained a super-sophisticated bomb. But she lost track of it and sold it to Angie who intends to give it to her girlfriend Sophie. When she gets the gift home and her girl unwraps it, they try it out together. Little do they know that their kinky landlord Howard is watching through a two-way mirror. When the girls go out for a bite to eat, he steals into their apartment, puts on some of their clothes and makes off with the vibrator. But Madame Suque is right after him, on the trail of the vibrator, and she's willing to do anything to get it back.