Alfie Allen and Gethin Anthony in Game of Thrones (2011)
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.