They're not human, they're lizard beings. Reptiles age much more gracefully than mammals. That's my theory. I mean, just look at Colin Powell and Condi Rice, for instance! Have you ever seen anything more Reptilian looking? Chech out Powell's hooded eyes! Rice has a neck like a cobra and an expression to match. There you have it. In Bush's case it's a little less obvious, but he does keep sticking his tongue in and out like a snake, and he resembles one of those Texas desert lizards, like a swift or a chuckwalla. His eyes shift nervously from side to side in a distinctly lizard-like fashion. Case closed.