"A young man and his date were parked on a back road some distance from town, doing what young men and women do.
Abruptly, the girl stopped the man dead in his tracks. '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 the obligatory cigarette, the man sat in the driver's seat, staring 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" (via email)
Always ask questions and be honest up front, otherwise you get what you give!