One of Lubitsch's finest and most underrated films, Design For Living tells of three expatriate Americans in Paris - a struggling painter (Gary Cooper), an undiscovered playwright (Fredric March), and their self-appointed protectoress (Miriam Hopkins). The threesome resolve to establish a platonic garret dedicated to the service of art, but the muse soon finds itself hard-pressed with both artists trying to get Miss Hopkins on a dusty couch and finally slipping into a blissful menage a trois that has their lady switching with casual promiscuity from one to the other. Obviously, Truffaut took a lot of Jules and Jim from this film. But there's trouble in this paradise, too, and when comradeship falls inevitably into jealousy, Miss Hopkins packs off to marry an incredibly stuffy businessman (played by the incomparable Edward Everett Horton) who uses her charm to grease financial transactions. The finale has the two prince charmings rescuing their princess from her wealthy suburbia castle, and their invasion and decimation of a high society party brings this cynical fairy tale to a properly amoral conclusion.