Or both? No, serious question. On Saturday Night Live, he was just that goofy nerdy guy with the half-decent smile. But now that he’s all grown up with his own television show to himself and a wardrobe budget that includes better tailored and flashier suits, Mr. Fallon is suddenly … reasonably attractive. But then he opens his mouth to deliver one-liners during the monologue, and his hot factor shrivels up.