Calvin and Hobbes by Bill Watterson for February 10, 1986
Mom: Wake up, Calvin. It's time for school. Calvin: I'm not going to school anymore. Mom: You have to. It's the law. Calvin: What about Hobbes? Why doesn't he have to go to school? Mom: He's a tiger. Get up. Calvin: What's being a tiger got to do with it? Hobbes: Tigers wreck the grade curve.