The abysmal teen comedy Joy of Sex is stripped down to just sex in every line and in every joke except where other bodily functions come into play. Alan (Cameron Dye) lusts after Leslie (Michelle Meyrink), whose father is a phys ed instructor with the heart of an army drill sargent and no tolerance for Alan -- though Alan is willing to go through almost anything to win Leslie's interest. As this love quest is going on, an undercover agent is out to make a major drug bust at the high school where these teens endure classes -- and some kind of a nut is gluing up odd objects in strange places at school. The bad dialogue is unfortunately matched by continuity gaffs (someone at a motel knocks down the door of room 302 to barge in on a couple in room 319) and other problems, making this a sure loser compared to the book of the same name, which has nothing to do with this movie.