In this movie, Hayden Leung gets completely undressed in the bathroom. We see his smooth butt and then his surprisingly huge uncut dick.

79 minutes in the movie, Giovanni Ribisi removes his shirt and drops his pants. At first, he turns around and we only see his butt.
But then he waves at a friend, and we get a good view at his dick too!

5 minutes in the movie, we see Franco Merli naked.
17 minutes in the movie, an uncredited black man is also naked. He is hung like a donkey. We can see his erect dick from behind in between his legs.
He is cut.
60 minutes in the movie, we see Ninetto Davoli's butt, and then his uncut dick.
Again we see both his butt and cock 63 minutes in the movie.

Paul McGann is naked first 84 minutes in the movie. He is naked in a bedroom. We see him from the back, so only his butt.
Then 100 minutes in the movie, Paul McGann is running naked in a forest. We see his butt and also his dick and balls moving around as he is running.

In this movie, we get rear nudity from Adrien de Van as he carries his sister into a bath tub. No frontal nudity from him, although there is a scene in a swimming pool where he floats on his back. He is wearing trunk underwear that are somewhat see-through and we can guess he has a pretty big package. There is a full frontal scene from Stéphane Rideau, as he is getting a blow job from Adrien's sister. However his huge penis appears to be a prosthetic.

Right at the beginning of the movie, we see Simon Goerts's ass and also his long uncut penis.
25 minutes in the movie, Sascha Backhaus is undressing. We see his butt but also his cut penis in the mirror.

In this short series, you have to wait for episode 2 to get nudity. Mark Priestley and Leon Ford show us full frontal and rear also. Mark Priestley has a nice cut dick. Leon Ford has a smaller uncut dick. In episode 3, there is additional nudity from Leon Ford, but only rear. In episode 5, Stephen Curry is naked but we mainly see his bushy pubes which are hiding his dick. We see it better but from further away when he is taken out of the room. We see his butt at that time too. When they are outside the barracks, we see Stephen Curry big cut dick and ass better. In episode 6, Mark Priestley is taking a shower outside in the nude with Matthew Whittet. We only see Mark Priestley butt and pubes in that scene, but we see Matthew Whittet's butt and nice uncut chubby. They are even comparing their dicks sizes when showering. These hot guys are also shirtless most of the time!

Garrett Hedlund is shirtless a lot in the movie.
30 minutes in the movie, Garrett Hedlund is naked and we see his butt as he is carrying a friend of his onto a bed.
For a frame or two we can see his penis. Garrett Hedlund seems to have a medium sized dick.

In this movie, Tom Hardy and Laurence Fox are both seen fully naked (frontal) as they are forced to take a shower after being captured. Both are uncut. Laurence Fox has a pretty big dick.

77 minutes in the movie, Bradley Cooper and David Gail are both fully naked in the police station.
We only see them from behind, so a good view at both their butts.