There are a lot of conversations about sexual encounters (potential & history), and several situations of couples wanting to or actually having sex where nothing is shown, ie; in the dark, behind closed doors, etc.
A man walks around wearing "speedo-style" swimwear. His pubic hair is visible sometimes. At one point, he wears a thong and his rear is visible.
Some women are body-painted. Breasts are visible.
A man's penis is visible from a distance.
A woman is topless at the beach. Her breasts are visible.
A man's penis is visible as he steps out of the shower.
A man is seen in his underwear, then his rear is briefly shown.
A woman removes all her clothes except her panties. Her breasts are briefly shown.