!! OMG, his butt: Ryan Kwanten !!
Of course, Ryan Kwanten's butt is no stranger to the public eye, what with his almost constant nudity on True Blood. In "Not Suitable For Children," Kwanten's butt is back for a movie about a man who learns he only has one month left to procreate before he becomes sterile... so you can only imagine how Kwanten's character spends his time. Check out those NSFW stills after the jump.
Click images to enlarge: