A woman shows a man a painting in a book named "the joy of sex" where a man and a woman are having sex and their nude bodies are clearly depicted.
There isn't even a hint of male nudity.
A painting of nude women is seen a few times, although its never focused on.
The film shows two men kissing (not passionately) many times throughout the movie.
The son meets a woman and there are sexual and implied sexual scenes between the two characters. No nudity is shown except for the side outline of a woman's breast as she dresses. Yet there isn't even a hint of male nudity.
A scene of the father kissing the son's mother is repeated several times with the sense of the interaction being forced because the father is gay.