"I really should have mentioned this earlier, but I'm actually a hooker and I charge $20 for sex." The man reluctantly paid her, and they did their thing.
After a cigarette, the man just sat in the driver's seat looking out the window. "Why aren't we going anywhere?" asked the girl.
"Well, I should have mentioned this before, but I'm actually a taxi driver, and the fare back to town is $25..."