A little girl
accidentally walks in on her father while he's getting  dressed.

She points to
his dick and asks, "Daddy,what's that?"

Not  wanting
 to explain sex to her yet, he says, "Uh, I can't tell you, it's a  secret."

 The little
girl finds her mother and asks, "What is that long thing  between  Daddy's
legs?"

Her mother also
doesn't want to explain sex yet, so  she  says, "I don't know, he won't tell
me."

 A couple days
later the little girl says to her mother, "Mommy, I  finally  figured out what
that thing between Daddy's legs is. It's a  toothbrush!"

 "Why do you
think that?" the amused mother asks.

 "Because," the
little girl says, "this morning I saw the maid sliding  it in  and out of her
mouth and she had toothpaste dripping down her chin."