Revenge to a Cab Driver

This guy flew to Vegas for the weekend of gambling.
He loses everything, but five dollars and his plane ticket. He needs to reach the airport badly.

There is a cab waiting in front of the casino. He gets in and explains his situation to the cabbie. He promises to send the driver money from home, he offers him his credit card numbers, anything - but the driver refuses:
- "If you don't have fifteen dollars, get the hell out of my cab!"
So our guy hitch-hikes to the airport and barely makes it on time for the check-in.

One year later, after a successful business year, the same guy comes back to Vegas and wins big, too. Sunday evening, feeling good, his pockets full, he gets out of casino to get a cab to the airport. At the end of the long line of cabs sits a cabbie who refused to drive him when he was down.
Our guy thinks a second, and gets an idea. He gets in the first cab in the line, and asks the driver:
- "How much for a ride to the airport?"
- "Fifteen bucks." - replies the driver.
- "And how much to give me a bl*wj*b on the way?"
- "What? Get the hell out of my cab!"
He enters every cab in the line asking the same question, with the same result.

Finally he gets in his old buddy's cab and asks:
- "How much for a ride to the airport?"
- "Fifteen bucks."
- "OK."
As they drive slowly by the long line of cabs, all the drivers look at them, and our guy winks at them with a big grin, showing thumbs up.

Nghee, nghee, this is an old joke but always makes me laugh. Did you get it? This driver is so stupid, he doesn't know what we all know, and that makes the situation funny. All the other drivers will think that he likes to give head, and he ... Ahaha!