You can tell when someone loves their job. And when Letterman gets to rail on Sarah Palin, you can tell he's loving every second. With Palin back in the news (though she never seems to leave) campaigning for John McCain, Letterman jumped at the chance to get some shots in. Referring to the motorcycle jacket she recently broke out, he said, "She looks like somebody Jesse James would date." Not done there, he went on to add how much he enjoys seeing Palin and McCain together again. "Doesn't it remind you of a Viagra commercial?"