In Gone Girl, Ben Affleck reveals his penis and butt for the first time in a movie.
In this famous shower scene, we can briefly see Ben Affleck's butt and penis from the side. Ben Affleck has a very big cut dick.

03/06/2015 Update: all pictures have been removed at the request of Twentieth Century Fox Film Corporation.

Serge Avedikian sees Piotr Stanislas bathing in his underwear, so he goes bath after that and is completely naked showing us a full frontal of his uncut dick. Two third through the movie, both are very drunk and end up peeing in their glasses. We get full frontal from both of them at that time. They are both uncut with rather long foreskins. Piotr Stanislas has a longer dick. After Piotr disappears, Serge who had become his lover, becomes crazy and ends up killing his dog. As Piotr comes back, he is upset and grabs Serge's genitals. They end up making love while their female friend is secretly watching.

One hour in the movie, there is a scene by a pond. Rupert Graves, Julian Sands and Simon Callow all get naked to go swim in the bond. At first, we only see their torsos. We see Simon Callow cut penis as he jumps into the pond. Then we see Julian Sands trying to climb at a branch. Finally we see Rupert Graves's butt and penis as he gets out of the pond.

40 minutes in the movie, Patrick Dewaere drops his pants and reveals his butt. Then he turns towards the cameras and proudly shows his flaccid uncut dick. He is also often in tight underwear or swimwear during the movie.

10 minutes in episode 1, we see Gale Harold's butt in a jock strap and then he removes it, revealing his bare butt.
31 minutes in episode 1, we see parts of Gale Harold's dick.
32 minutes in episode 1, we see Randy Harrison's balls.
35 minutes in episode 1, we see Gale Harold's thick cut dick

3 minutes in episode 3, we see Gale Harold's butt again.

26 minutes in the movie, Jonathan Watton is naked in bed making love to two women. When he leaves the bed, we see his butt. Then he sits in the chair and we see his penis. He then masturbates briefly watching the two women.