A little boy gets on the public bus and sits right behind the bus driver. The boy keeps saying,"" If my mom was a cow and my dad was a bull, I'd be a calf. If my mom was a hen and my dad was a rooster, I'd be a chick. If my mom was a doe and my dad was a buck, I'd be a fawn."" The annoyed bus driver stops the bus and turns to the boy, saying, ""What if your mom was a drunk and your dad was a bum?"" The boy responds, ""Then I'd be a bus driver.""