Child asks his mother an embarrassing question, but what Dad replies is amazing

A couple took their young son for his first visit to the circus.

When his father left to buy popcorn, the boy asked, "Mom, what's that long thing on the elephant?"

"That's the elephant's trunk, dear," she replied.

"No, Mom, down underneath."

His mother blushed and said, "Oh, that's nothing."

The father returned, and the mother went off to get a soda. As soon as she left, the boy repeated his question.

The father took a good look and explained, "That's the elephant's penis."

"Dad, how come when I asked Mom, she said it was nothing?"

The man took a deep breath and replied, "Son, I've spoiled that woman."