Blond and the breathalyzer

[Mike54]

A cop saw a car weaving all over the road and pulled it over. He walked up to the car and saw a nice-looking woman behind the wheel. There was a strong smell liquor on her breath.
He said, 'I'm going to give you a breathalyzer test to determine if you are under the influence of alcohol.' She blew up the balloon and he walked it back to the police car. After a couple of minutes, he returned to her car and said, 'It looks like you've had a couple of stiff ones.'
She replied, 'You mean it shows that, too?'