Passionate embracing and kissing.
Cleavage revealing dresses.
In a 10-second flashback, a shirtless Robinson and his girlfriend, Mary, are lying in bed together. Mary gets up stand in front of the fireplace, and removes her nightgown. Her bare buttocks and legs are seen and her long hair covers up her back.
In another flashback, that lasts for five seconds, Mary is laying on top of Robinson and she kisses him.
Friday (and others from his tribe) does not use a lot of clothing. Robinson is seen in mid-distance going swimming naked, jumping off a rock into a pond full of water underneath a waterfall. Nudity involves male full rear and and brief genital nudity.