Jean-Louis Trintignant was a French actor who worked with all European art house directors between the 1950s and the 2000s. He is known for his economic acting.
Here he is in My Night at Maud’s (1969):
BDSM-wise (let’s, shall we?) two films come to mind.
First there is Trans-Europ-Express (1966) by Alain Robbe-Grillet in which you can see at 1:15:00 how Trintignant half-heartedly ties up and strangles Marie-France Pisier .
Then there is The Libertine (1968), an Italian sex comedy posing as a sex education film directed by Pasquale Festa Campanile.
Its main theme is the ‘perversion’ of female domination.
It has a scene in which Catherine Spaak rides Jean-Louis Trintignant as a horse.
Spaak riding Jean-Louis Trintignant can be seen at 03:08.