只是性，而没有别的

Robert is a married architect whose life is full of beautiful and dangerous women. His wife hires a private investigator to collect evidence of his infidelity in order to get a divorce. But she will get more than she bargained for.

When two college students, Sam and Thea, meet Coles at a party, their mutual attraction is immediate, leading to a passionate and awkward night together, and the onset of an intensely charged bond. As they continue to push the sexual boundaries of their friendship, however, they are tested by Sam and Coles' incipient romance and Thea's increasing recklessness, until the relationship dissolves amid a cloud of fear, resentment and mistrust. Eight years later they reunite. An animator for a high-profile ad agency, Coles now lives with Claire, his girlfriend of five years. Thea is happily married to Miles, with whom she owns a flourishing restaurant. And Sam has just returned to Manhattan after working in London where she recently broke off her engagement. Yet upon reconnecting, the three are drawn back into the complicated dynamic that defined their relationship from the start and are forced to confront the true meaning of commitment and love.

A screw ball sex comedy following two couples and their ten rules to a happy healthy and open relationship.