Suppose you found yourself on a distant planet. Everyone on your spaceship has disappeared except for you and a rat. You get out to see what the aliens are like, of course, but the rat pokes his head out, takes one look at the place, and darts back into the ship. You go to meet these aliens.

"Time to get out."

And they're a wonderful crowd. They're all thin, well-dressed, entertaining. They're all rich and, most importantly, have fascinating jobs. In fact, there are no poor, dull aliens. Everybody has a healthy diet, a beautiful old house which they've fixed up themselves. Their kids are in law school. Everyone has a cell phone planted in the side of his head and tells amusing stories while sprinkling balsamic vinegar on everything. And after a few hours of this, one of your eyelids starts twitching and it's time to get out. You go back to the spaceship and find the rat waiting for you. "Had enough?" he says, and you're glad to be back with your fellow-creature. The two of you have so much in common.