An old, blind cowboy wanders into an all-girl biker bar by mistake.
He finds his way to a bar stool and orders a shot of Jack Daniels.  
After sitting there for a while, he yells to the bartender,
 
'Hey, you wanna hear a blonde joke?' 

The bar immediately falls absolutely silent. 

In a very deep, husky voice, the woman next to him says, 
 
'Before you tell that joke, Cowboy, I think it is only fair,
Given that you are blind, that you should know five things:  
 
1.. The bartender is a blonde girl with a baseball bat.  
 
2.. The bouncer is a blonde girl.  
 
3.. I'm a 6-foot tall, 175-pound blonde woman with a black belt in karate. 
 
4.. The woman sitting next to me is blonde and a professional weight lifter. 
 
5.. The lady to your right is blonde and a professional wrestler.   Now, think about it seriously, Cowboy.
 
Do you still wanna tell that blonde joke?' 
 
The blind cowboy thinks for a second, shakes his head and mutters,
 
'No ... not if I'm gonna have to explain it five times.