A blind man enters a Ladies bar by mistake. He finds his way to a barstool and orders a drink. After sitting there for a while, he yells1 to the bartender: "Hey, you wanna hear a blonde joke?" 
The bar immediately falls absolutely quiet. In a very deep, husky voice, the woman next to him says: "Before you tell that joke, sir, I think it is just fair - giving that you are blind - that you should know five things: 
1. The bartender is a blonde girl. 
2. The bouncer is a blonde girl. 
3. I'm a 6 feet tall, 160 LB. blonde 
woman with a black belt in Karate2. 
4. The woman sitting next to me is 
blonde and is a proffesional 
weightlifter. 
5. The lady to your right is a blonde 
and is a proffesional wretler. 
Now, think about it seriously, Mister. Do you still wanna tell that joke?" 
The blind man thinks for a second, shakes his head and declares: "Nah, not if I'm gonna have to explain it five times".