The Special Two

I can't take full credit for this idea. But I will take full credit for writing it out. So basically, there is this guy and this girl who both happen to be walking down the same street and they catch each other's eye. He says "Hey baby, you got plans tonight?" and she answers "I don't know do we?" Then they go to a Hotel and get a couple drinks at the bar before heading up to a room. After about... I don't know, let's say 40 minutes, they are getting dressed in the hotel room and the guys says to the woman "By the way, I only take cash."
She answers "You only take cash? You mean you only have cash?"
"No I only take cash but I do have some cash if you need change?"
She's confused and asks "Why would I need change?"
This goes around and around for another... I don't know, let's say 8 minutes. Then they finally realize that they are both prostitutes. Of course they each insist that the other pay while they also each refuse to. Additionally, it turns out that they have the same pimp, and because of his very strict collection policy he is foced to shoot them both in the head. He's not sweating it though because he has plenty more prostitutes where they came from.