French drama from writer-director Francois Truffaut. A respected author and lecturer (Jean Desailly) has an affair with a young stewardess (Francoise Dorleac).
I believe this film is deeply personal for Truffaut. He has several films about male protagonists who cheat on their wives or girlfriends (Bed and Board and The Man Who Loved Women, for example). What I like best about The Soft Skin is precisely that the affair happens because the stewardess is impressed to get involved with a minor celebrity, and he sleeps with her mainly because he can. They don't "fall in love" with each other; it's an adultery story, not a love story. Because the emotional involvement of the characters isn't very great, neither is the involvement of most of the audience. I will infer that Truffaut had more than one fling like this, but had no insight into why he did this. The subject is personal, but nothing about the presentation helped to alleviate that paucity of engagement.
Two other points: 1) Truffaut's films tend to be very one-paced. They don't usually quicken, slow down, speed up, etc. They proceed pretty much at the same pace from beginning to end. This is a real limitation. 2) I have come to believe that as much as Truffaut loved Hitchcock's films, as a director he learned absolutely nothing from him. Hitchcock is a master of pacing. The best moments in Truffaut's films usually come from a realist aesthetic that is the opposite of Hitchcock's master manipulation of genre and audience.