A 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 crapped on the carpet."