Three couples find out that sexual inhibitions in the USA are loosened at every opportunity. After a cocktail party, three couples stay on to talk about their fantasies. The women trail off into another room, however, and relate all the juicy details of their numerous affairs. Left alone, the men fall into the same kind of sexual shop talk as well. What their respective mates don't know is that they have shared partners and didn't even know it! One particularly sex-hungry female hairdresser seems to have made the rounds with all the couples and her presence is felt in more ways than one! Yes, there is plenty of... Lust In America!