Elles font tout (1979)

Three men find themselves at the Free Love Hotel, for a night of sex: one is a short man who's meeting a tall girl who placed a small ad in an adult magazine; one is a hairy, timid man who married a dominant wife; and the other is an effeminate man in his first day of marriage. They have a hard time in their relationships, and the unsatisfied ladies have to ask relief from room service that serves them breakfast in bed, and more. The hotel staff can't cope with the extra demand, but by chance Nini, a porn star is also staying at the hotel to learn her part in a movie, and gives them all tuition, and an expert hand.