Funny Joke

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