A little boy runs home from school crying.

His mum asked "What's wrong my boy?" Sobbing he told his mother that the kids in his class were making fun of him because he didn't know what a penis was. His mum said "Son, wait for your dad to get out of the shower and he will explain it all to you".

Having finished with the shower and been told by the boy's mother he drops his robe in front of the boy as he entered the room.

"Son, mum told me about your day. This is a penis; in fact this is a PERFECT penis".

The boy understood.

The next day at school the children again taunted him for not knowing what a penis was. This made him smile as he said he knew what a penis was and could prove it. With that he pulled out his penis from his trousers and said "This is a penis, in fact if it was three inches shorter it would be a PERFECT penis".