Sex is often all about the carefully orchestrated ratio of pain to pleasure and, from the look of things, this bottom may have miscalculated a bit. Still, that doesn't mean that we can't have a good time!
We don't know what it could be. This Xtube clip features pretty standard fare for a hardcore video and our bottom doesn't sound like he's in pain, but for the entire thing he just keeps making these scary grimaces. That's not to say that this lessens our enjoyment of this incredibly hot clip in, like, the slightest. We're just sayin'.