A little boy and girl are sittin in a sandbox when they both stood up and their pants fell off and they asked each other
"Whats that"
pointing to their private parts. They both ran home and the little boy asked his father what his penis was and dad answered,
"Thats your truck, try to park it in as many garages as you can."
The little girl asked her mother the same question and her mother said,
"That's your garage. Don't let any boy park his truck there." So the next day the little girl comes running home yelling
"Mommy, mommy, a boy tried to park his truck in my garage so i knocked his wheels off!"