A mailman walked down the street and saw Little Johnny playing in a pile of shit, had it between his fingers and smeared over his body.

The mailman asked him what he was doing and Johnny looked up and said "Making a mailman".

This pissed the mailman off, he went up the street and saw a fireman. He told the fireman what the boy was doing and what a smart A*s the kid was, the fireman said that he would have a talk with the boy.

The fireman walked up to Little Johnny and asked him what was he doing playing in pile of shit, Johnny looked up and said "Making a fireman".

This pissed the fireman off so he left to tell a cop. The cop said that he would have a talk with the boy.

The cop asked Little Johnny "What are you doing, playing with a pile of shit?"

Little Johnny looked up and said nothing.

The cop said "You told the mailman and the fireman that you were making a fireman and a mailman, why don't you tell me that you are making a cop?"

Little Johnny looked up and without a grin said "Because I aint got enough shit".