That's nothing...

A young boy went to the zoo with his parents and was watching the
elephant exhibit.  The young boy noticed a, shall we say, "an
appendage" hanging below one of the elephants (not a trunk, or tail)
and asked his mom what it was.  "Oh, that's nothing," replied the
befuddled mother, so the boy decided to ask his dad.  "Dad,", pointing
to the elephant's appendage, asked the boy, "what is that?"  His dad
replied, "That's the elephant's penis".  "Really?" asked the boy,
"When I asked mom what it was, she said it was nothing."  
 
"Well, son... Mom's spoiled."