Why is it...

that no matter what position Steve falls asleep in while on the recliner in the living room, when I look over at him 10 minutes later, he's still sleeping, but with his hand now down his pants? I mean, does his hand gravitate there in his sleep? Does he wake up, think, "Shit! I'm not touching my unit!" and put it there on purpose before falling back to sleep? One of life's greater mysteries I suppose.