A Quarter Back

I knew a blonde that was so stupid that she thought a quarterback was a refund.

The Chair

A professor invented a lie detecting chair. Whenever anybody sitting in it told a lie, the chair would open up and dump the liar on the floor. During an experiment, a brunette sat in the chair and the professor asked her to tell about herself. She began, "I think you are the best teacher I’ve ever had." The chair immediately dumped her on the floor. After the brunette left in a snit, a blonde sat in the chair. The professor asked her to tell something of her life. She began, "I think " The next thing she knew, she was sitting on the floor.

Blonde Running With Bike

Q: Why did the blonde run with the bike?
A: It was going too fast for her to get on.