Although there are lots of jokes, sex talk, and innuendo, there is never any sex or nudity, although there is one scene that implies two characters had sex, when one of the main characters wakes up with a woman, having accidentally gotten high the night before, although this is played for comedic effect.
Roy is surrounded by women in a sensuous environment. They sensually touch him and one of them kisses/licks his ears. A very sensual scene with some suggestive sounds. Though this turns out to be a dream.
A sexual encounter is implied and some characters visit several brothels, although no related activity occurs on the screen.
Roy and Chon Wang are half-naked in the bath. Then in the next scene, they are on the same bath. They are both pretty drunk, and Chon puts his hand on Roy's arm. Roy tells him to take it off.
In a deleted scene on the DVD, Roy finds an Indian woman skinny dipping in the river. She stands up and it's obvious he can see her breasts. We see the sides of her breasts.