 Cathy and Stanley fall in love, but she is a virgin and initially refuses his sexual advances, leaving him frustrated.Finally she agrees to sleep with him and the two settle into happy domestic life for a time, but Stanley soon becomes bored with the relationship and fantasizes about Andrea.When Cathy expresses concern about the promiscuous behavior of her chubby roommate Fran (Holly Near), Stanley invites Fran over under the pretext of filming her for an underground movie called "Masturbation."