-Movie opens with a man sitting up on bed and we can see the bare legs of a woman on bed too. Implied they are a couple. No nudity
Man comes home from work and meets his girlfriend on bed. While telling her about how his day at work was, he's undressing and kissing her. He removes her panties and penetrates her offscreen (no nudity). They proceed to have sex and after another conversation they resume intercourse and this time we see her nipple briefly.
Bare chested men seen on locker rooms and while showering several times throughout the film
A woman meets her boyfriend on bed, she is wearing panties and an open jacket and he is wearing boxers. She kisses and caressess him and he gets on top of her about to initiate sexual intercourse. He begins masturbating himself (no nudity) instead of penetrating her. At some point he starts groping her breats. She grows impatient and he gropes her harder, hurting her.