A blonde was in a car accident and got a dent in the side of her car. She took it to a shop and asked how to fix it.

The mechanic realized she was blonde and decided to have some fun with her, so he said, "If you blow on the tailpipe, the dent will pop right out."

The blonde went home and started blowing on the tailpipe, but no matter how hard she blew, the dent would not pop out.

Her roommate, who was also blonde, came home and asked her what she was doing. The first blonde told her friend what the mechanic said, and that it wasn`t working. Her roommate replied, "Duhh, first you have to roll up the windows."