A great song by the team Jacques Lanzmann (Lyrics) and Jacques Dutronc for the music.
This version black and white on YouTube. Apparently the flute that is such a great part of song was added at the very last, by luck because of the presence of classic musician Roger Bourdin whose performance really transforms the whole piece. Of course at the time nobody cared about having Dutronc smoking on the cover of the record.
Lyrics (by Jacques Lanzmann and Anne Segalen -who is often forgotten-. She was Lanzmann's wife at the time.)