Sean Bean is a soccer player in this movie. After a match, all the players end up naked together in a big tub. Interesting habit! As Sean gets in and out of the tub, we see him full naked, front and back. He is uncut but does not seem very well endowed... unless the water was cold!

Alfie Allen is naked 16 minutes in episode 5 of season 1.
He proudly shows us his massive uncut dock. As his fellow actress says, he is a "serious boy with a serious cock".

Later in the episode, we get a partial butt shot of Gethin Anthony, after he gets a complete shave from his boyfriend Finn Jones.