A blonde who is wearing a dress is walking home from school. She comes across a boy sitting up in a tree.
The boy says to do a cartwheel and the girl says no. Then the boy says "I'll give you a cookie."
So the blonde does a cartwheel. When she gets home, her mom asks where she got the cookie from.
The blonde tells her mother about the boy in the tree and the cartwheel.
The mother twills her daughter not to do that anymore. The boy is just trying to see her underwear.
The next day the blonde is wearing a dress again and the boy asks her to do a cartwheel again. 
The blonde says no and the boy says "I'll give you a cookie." So the blonde does the cartwheel again.
When the blonde gets home, the mom says "Did you do a cartwheel again."
The blonde says "Yes"
The mom says "Honey I told you not to do that, the boy is just trying to see your underwear."
Then the blonde says "But mom I tricked him,today I didn't wear any underwear!"