There are some things that you think about when you're watching two people fuck that don't come to mind when you're doing the fucking. Example: "This top has, like, the most amazing ass ever!"
It's almost sort of odd, if you think about. Never is a man's bootyliciousness less important than when he's in the middle of fucking someone else's ass. But then, we just love the image of a man with a nice butt pounding somebody else's. Xtube user NEverthinkno looks damn good fucking his buddy here, but looking at that ass, all we can think about is how much we'd like to do the same thing to him.