Teacher asks the children to discuss what their Dad's do for a living.
Little Mary says: "My Dad is a lawyer. He puts the bad guys in jail."
Little Jack says: "My Dad is a doctor. He makes all the sick people better."
All the kids in the class had their turn except Little Johnny.
Teacher says: "Johnny, what does your Dad do ?"
Johnny says: "My Dad is dead."
"I'm sorry to hear that, but what did he do before he died ?"
"He turned blue and shat on the carpet."
