Pearls Before Swine by Stephan Pastis for May 19, 2009
Pig says, "What are you reading, Goat?" Goat says, "The complete works of Alexander Pushkin." Pig says, "Oh, I love that guy." Goat says, "You do? How do you know him?" Pig says, "He keeps all my papers stuck to the bulletin board." Goat says, "That's push pin." Pig says, "Oh. Maybe they're brothers."