Manuel Blanc shows us all during a shower scene of this movie. We see first his butt and then his penis that we get to see from a shorter distance when he gets out of the shower. Manuel Blanc has a rather small uncut penis.
23 minutes in the movie there is a scene with a sauna. All men undress and we see their uncut dicks and butts as they walk around. Alain Delon is not one of them. Then they go swim naked in the ocean. Alain Delon who happens to walk on the beach joins them. We see from a distance Alain Delon dick flopping around as he runs towards the ocean. Then we clearly see Alain Delon's butt. Then he faces the camera and we see many views of his uncut dick that he is proudly showing. People were not as prude as today in the 70s!