Guy walks into a bar. In the back is a poker table with six players in the game. One of them is a big, old, yellow dog. Dog is shoving chips in with one paw, holding cards with the other, looking around the table, etc. Guy goes to the bartender and learns that this same group (including the dog) is in every Saturday night. "But the dog isn't a good poker player at all," says the bartender. "Every time he gets a good hand, he wags his tail."