Ewan McGregor has sex with many woman throughout the movie. 51 minutes in the movie, the woman he is in bed with pulls the cover out of Ewan. It reveals Ewan McGregor's very impressive soft uncut dick.
From the get go, we see Jamie Bell shirtless. He is skinny. 21 minutes in the movie, Jamie Bell is completely naked but can only been seen from the side, covering his genitals. We still get a decent view at his firm butt. 45 minutes in the movie, we see Jamie Sives's butt as he is making love to a woman. And again 53 minutes in the movie. 71 minutes in the movie, Jamie Bell is completely naked again. He is covering his genitals but we can get a good view at his butt a number of times and also sideways when he is urinating.
In this movie, Ashton Kutcher is a boy toy. We can admire his body through all angles. A front nudity is missing... although the lack of bulge in the underwear may indicate we are not missing much!