Last Rites (1988)

A man stands behind a woman up against a window, having sex, moaning and thrusting. Interrupted, the man turns around, exposing full frontal and erect penis, also showing partner's breast partially.

A naked woman stands in front of clothed seated man. We see her only from the rear. She begins undressing him and they begin kissing. They are then shown presumably naked on a bed, making love, moaning, close-ups only showing faces and extreme close-ups of skin contact.

A woman is shown in the shower fully naked but only from behind and slightly blurred through the steamed shower door. You can still see her buttocks despite the blurriness.

A man and woman begin kissing and the scene then switches to them on the bed beginning to make love. But the scene ends before they undress, so there's no nudity. However, sex is implied.