Ali is shown shirtless in a few scenes, but full frontal in another scene, along with a woman fully nude shown from the rear. Sex scenes are inferred rather than reenacted.
In one scene, Ali is seen showering. About three shots show his full frontal nudity.
Later in the film, Ali undresses in expectation of sex with a woman. He undresses completely and stands fully naked, facing the camera, for a few of seconds. A fully naked woman, seen from behind briefly, enters the room and they embrace and lay down together.