There is only one scene in the movie where Rupert Evans is fully naked on the bed and we can see his penis as he is making love to a woman.
As he is lying on a bed, for a few frames we can see Rupert Evans big uncut dick.

40 minutes in the movie, Chad Connell and David Cameron are getting naked.
We see both butts.

72 minutes in the movie, Chad Connell is getting out of bed while naked. We see his circumcised penis and big balls.

77 minutes in the movie, Chad Connell and David Cameron are naked in bed and we see both butts again.

92 minutes in the movie, Chad Connell and David Cameron are swimming naked in a lake, and then we see them sunbathing in the nude. We only see their butts.

In this movie, David Paisley and Jonathan Keane have a gay relationship. We see them having sex in a scene where we view Jonathan Keane's butt and briefly David Paisley big uncut dick. In that scene David Paisley is the bottom of the sexual act. Later in the movie, they are taking a shower together and we see both of them naked, front and back. They both have big uncut dicks, especially David Paisley.

26 minutes in the movie, George Clooney is standing naked kissing a woman. As the camera turns around them, we see George Clooney's butt in various angles. Again 37 minutes in the movie, George Clooney is lying down naked on the bed. He is on his stomach. There is no much movement besides his cheeks contracting.

65 minutes in the movie, Damien Chapelle is naked in bed. But we only see him partially. We see his pubes.

66 minutes in the movie, Damien Chapelle is standing naked. The room is rather dark but brighter at moment and we can see his uncut dick.

Mid movie, Jesse Spencer, the famous doctor or House M.D., goes running naked to the ocean. We first see his butt, slightly out of focus. No full frontal at that time, although when he is running, we almost get to see his dick. At the beginning of the second part, we see him swimming again, and we see clearly his butt, and then again when he gets back to the beach. Towards the end of the second part, Jesse is naked again on the beach. But a frontal is avoided by the camera and we only get to see his butt. Only the DVD documentary includes extra shooting of Jesse Spencer frontal nudity at the beach. The last two pictures are from that documentary, as provided by nakedaustralians.com.

43 minutes in the movie, we can see 12 naked firemen. They are all uncut except 2 of them.
63 minutes in the movie, Jean-Paul Rouve and Guillaume Gouix are in a sauna, with nothing but a towel around their waist.
As they are putting their clothes back on in the locker room, we get a good view at Guillaume Gouix thick uncut dick as well at at his smooth bubble butt.

24 minutes in episode 1 of season 1, Luke Treadaway is getting naked to go into a sauna. We see his butt as he removes the towel around his waist. The cameras stays on him and we can admire his great body in the sauna. Then when a woman enters into the sauna, Luke covers his genitals with his hand. While he does, there is one frame where we can see his nick and big uncut dick.

In episode 2, we get a quick view at Aaron McCusker's uncut penis as he walks naked into a kitchen.

34 minutes in the movie, Thyago Alves is showering by the sea in his swimsuit. No real nudity but some nice views of his amazing body. 50 minutes in the movie, we see Massimo Poggio in a shower. We only see his butt. 70 minutes in the movie, Thyago Alves is getting naked and masturbating. We only see part of his dick and through his underwear, which appears to be uncut and rather small. We also see his butt. 91 minutes in the movie, Thyago Alves and Massimo Poggio are making love. We see Thyago Alves hairy ass and legs. We see a full frontal of Massimo Poggio.

14 minutes in episode 5 of season 1, we see Jonathan Bailey's butt as he is getting out of bed naked.
After he puts a brief on, he faces the camera and reveals a nice bulge, not leaving much to imagination.