South Park once did a wonderful story about Underpants Gnomes. Tweak, the boys' new friend, was constantly wired on caffeine from the coffee his coffee shop-owning parents kept pumping into him. (Yes, they would do that. This is South Park we're talking about. Besides, if you read past the Underpants Gnomes premise, what's the problem with a ten-year-old caffeine addict?) Since Tweak never slept,…