A Blonde Joke

A blind man and his guide dog enter a Bar and find their way to a bar stool. After ordering a drink, and sitting there for a while, the blind guy yells to the bartender, "Hey, you wanna hear a blonde joke?"
The bar immediately becomes absolutely quiet. In a deep voice, the woman next to him says, "Before you tell that joke, you should know something. The bartender is blonde, and I'm blonde with a black belt in karate. The woman sitting next to me is blonde and she's a weight lifter. The lady to your right is a blonde, and she's a pro wrestler. Think about it seriously, Mister. You still wanna tell that joke?"
The blind guy thinks a moment and says, "Nah, not if I'm gonna have to explain it four times."