The elephant
A mother is with her 5 year old boy at the zoo when they reach the
elephant cage. The 5 year old boy looks with amazement at the large
beast and says to his mom, "What's that long thing hanging down from the
elephant?"
The mom replies "That's his trunk".
The little boy goes, "I know that, the thing to the other side of the
trunk."
The mom replies "Oh, that's his tail".
The boy goes, "I know that! No, what's that big thing hanging down in
between the trunk and tail."
The mother, wanting to avoid this subject at all costs, just says "Oh,
that's nothing" and whisks him off to the next exhibit.
Two weeks later he goes to the same zoo with his dad. They are at the
elephant exhibit and he asks his dad "What's that long thing hanging
down from the elephant?"
The dad replies, "That's his trunk."
"No, behind that!" says the kid.
"Oh, well that's his tail" replies the father. "NO, in-between the trunk
and the tail!" yells the kid.
The father replies, "Son, that's the elephant's penis."
The kid, a bit puzzled, tells his dad, "But Mom said it was nothing."
The dad put his hand on his son's head and replied, "Well son, your
mom's been spoiled."