A new teacher was trying to make use of her psychology courses.
She started her class by saying, "Everyone who thinks they're stupid, stand up!"
After a few seconds, Little Johnny stood up.
The teacher said, "Do you think you're stupid, Little Johnny?"
"No, ma'am, but I hate to see you standing there all by yourself."
Three guys sit in a bar complaining about their wives. The first guy says, "My wife is so dumb, she carries an automatic garage door opener in her car and she doesn't have a garage door." The second guy says, "My wife is so dumb, she listens to an iPod and she doesn't have any earphones." The third guy says, "My wife is so dumb, she carries a purse full of condoms and she doesn't even have a d**k."
An infinite number of mathematicians walk into a bar. The first one orders a beer. The second one orders half a beer. The third one orders a fourth of a beer. The bartender stops them, pours two beers and says, “You guys should know your limits.”