Funny Dirty Joke

A little girl walks up to her mum and pulls down her pants.
Little Girl:Mummy what's this?
Mum:That's your garage.
A little boy walks up to his dad and says.
Little Boy:Dad what's this?
Dad:This is your car, you'll have to put this in a girls garage someday.
The little girl comes home one day and the mum asks.
Mum:What Happened?!
Little Girl: A boy tried to put his car in my garage so I ripped his wheels off.