A gorgeous young woman gets into a taxi one day. 

On the way, the cabby asks her, "Hey baby, would you screw me for 25 dollars?" 

Insulted, the woman asks, "What kind of a girl do you think I am??" 

"Well," the cabby says, "If I was a multi-millionaire, and paid you a million dollars, and had the body of a famous movie star, would you do it with me then?" 

"I guess I would," the woman says. 

"In that case," the cabby says, "Will you screw me for 25 dollars?" 

"What kind of a girl to you think I am??" the woman says again. 

"We've already established that. Now we're just dickering over price."