Sex is discussed frequently, and male and female sex organs are mentioned, sometimes in vulgar terms.
A man and woman make plans to have sex in various rooms. In one scene they kiss passionately. In another scene they are caught in the early stages of coitus. There's no nudity in any of these scenes.
A nude man is seen from the side, and then full frontal, but the genital area is thoroughly blurred. A woman is topless for a moment, but only a partial side of breast is visible, fleetingly. She is seen in her bra a couple of times, and panties are visible below a nightshirt in one scene.