A naked man being held captive is forced at gunpoint to ejaculate on command. Nothing is shown in-camera other than his body gesturing that he is trying to masturbate.
The film deals with the filming of pornography. The beginning scene is "rape porn" where two women (porn stars) act like they are raped by a man. Throughout the rest of the film, there is a lot of discussion of pornography, including oral and anal sex.
During the sex scenes, breasts, butts (male and female), shaved vulvas, and penises are visible. Though blurred out, a man is shown masturbating. The sex scenes include oral sex (both males going down on females and females going down on males), breasts bouncing, and lots of groping.
A woman is shown fully nude in the shower, breasts and pubic region visible. A man pranks her by using a dildo and recreating the shower scene from "Psycho".