The male is asleep on the bed and the female removes his shirt and then removes his shorts revealing his flaccid penis. She holds the shaft of his penis and kisses it softly twice on the top near the base. It's not really oral sex. She then covers it with the sheet and rest her head there.
Generally speaking there is a lot of nudity in this film, especially male as the lead walks around completely naked frequently, fully exposed. The female "full frontal" is limited to frequent breasts and heavy pubic hair. At no point is the female genitalia displayed in this film.
A woman is breastfeeding a baby when reveals her breasts to a man sitting there.
There are two versions of this film. The original, released in theaters in France and the US, and on video (vhs, dvd and bluray) which is R-rated, which includes semi nude, female nudity, and several sex scenes with people half dressed or partially under covers engaged in implied sex. There is also an unrated later directors cut with significantly more nudity, although no aroused male frontal and no penetration
The movie opens with a realistic, graphic scene of a man and woman making love on a bed, completely nude. The woman climaxes in the scene. Penetration is not seen.
A woman tries to proposition a man, undoing her clothes and thrusting herself at him. His face is briefly in her crotch.
A woman taunts a man by flashing her bare chest and crotch at him.