There are two explanations for this dick. Either there's some involving camera angles, or this guy's dick is actually twice as big as either of his skinny little arms. For once, we're not so sure.
Okay, we know that his dick isn't actually bigger than either of his arms: that's obviously just the camera's perspective at work. Still, considering the boundaries of human variability and anatomical proportions, we're guessing that Xtube user azakura_yoh has one huge piece of meat on his hands. Seriously, that thing looks friggin' bionic. It looks like someone took the penis off the Incredible Hulk and screwed it onto poor Bruce Banner's twinky little body. i.e. totally hot.