The Dreamers

A love triangle founded upon incest, although the incestuous aspect is limited to kissing and sexual dares and the homoerotic aspect is limited to communal bathing. So really it's just a healthy relationship with a creepy brother mincing about in the background. Disappointingly, the message of the film seems to be that such sexual indiscretions, like 60s radical politics, are youthful endeavours that you'll grow out of at some point.