Blond joke with a twist?

A blond left her little sports car parked at the curb and it got hail damage during a sudden storm. Dismayed she was in tears when her blonde boyfriend stoped by and sugested she take it to a body shop and get an estimate on the repairs. She drove to the body shop and told the man she wanted an estimate on repairing the dint damage.. He decided to see just how true the blond jokes were. That evening when her boyfriend came by he found her on her hands and knees blowing into the exhaust pipe. "What on earth are you doing?" he demanded. The blond explained that the body shop man had told her she could leave the car parked in the sun all day and then blow into the exhaust and the dints would just pop right out. Otherwise, it would cost her about $2000. She was happy to save that much money by doing it herself. Her blonde boyfriend shook his head. "You really are a dumb blonde," he told her. "That won't work. You left the windows rolled down!".