The blonde went to Las Vegas. She had been in the casino for about an hour, and realized she was thirsty. So she went to the pop machine in the hall. She put $1.00 in an a Pepsi came out, she put another $1.00 in and another Pepsi came out, she put one last $1.00 in and another Pepsi came out.
A man saw her, and he said: "What are you doing?" And the blonde said: "Duh!! Winning!!!"