A Mother and Father take their young son to the circus.
When the elephants appear, the son is intrigued by them, and he turns to his mother and says, "Mom, what's that hanging between the elephant's legs?, is it another trunk"
The mother is very embarrassed, and says "Oh, it's nothing son."
So the son turns to his father and asks the same question.
The father replies, "It's the elephant's penis, son."
So the son says, "Why did mom say it was nothing?"
The father says proudly, "well son, she's been spoiled."