Wife Swap

From the liner notes: While wife is home making sex with her lover, hubby comes home unexpectedly causing the lover to run and hide in the closet. Paul, playing the husband, handles it with aplomb, however, and narrates a flashback that explains his situation - then allows Steve to fuck his wife while he watches. A couple walking on the beach discover a lone girl photographer The wife encourages her husband to pick her up and make love to her while she takes photos. The Husband of couple A inserts part C into the wife of couple B. The daughter of couple A does the husband of couple C. It gets more confusing, but everyone involved has a really good time. Craig tells his wife that he's going fishing, then, sneaks back to try and catch her with another guy. Much to his happy surprise, it turns out the wife's lover is another woman.