Guy at a bar sits down next to a very attractive woman. They give each other the once-over, and he casually asks "Would you have sex with me for ten thousand dollars?"
She looks him over a little more carefully, then nods her head yes and starts to pick up her purse.
"Great," he breathes, obviously relieved. "Would you have sex with me for fifty dollars?"
Surprised and angry, she pulls back, righteous indignation showing on her face. "Of course not," she snaps. "What do you think I am?"
"We've established that," he replies. "Now we're negotiating."