A blind man and his guide dog enter a bar and find their way to a barstool. After ordering a drink, and sitting there for a while, the blind guy asks the barman whether he wants to hear a blonde joke.

The bar immediately becomes absolutely quiet.

In a deep, husky voice, the woman next to the blind man says,

"Before you tell that joke, you should know something. The barman is blonde, the bouncer is blonde and I'm a six foot tall 200lb blonde with a black belt in karate. What's more the woman sitting next to me is blonde and she's a weightlifter; the lady to your right is blonde, and she's a pro wrestler.

Think about it seriously, mister.

Do you wanna tell that blonde joke?"

The blind guy says,

"Nah, not if I'm gonna have to explain it five times."