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
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."