Le Propre de l'homme is a 1960 film directed by Claude Lelouch.
Claude and Janine get to know each other through friends. They spend a day in Paris and they become a couple.
An exploration of the formation of a couple from both points of view.
This was the first full-length film by Claude Lelouch, and was a complete commercial disaster. All copies were later destroyed by Lelouch himself.