[MeneMeneTekelUpharsin]

One can have a bit of fun this way: Strike up a conversation with a young lady, say, of college age whom you know. Ask her if she'd have sex with (point someone out) for $100. She'll probably say no. Then, ask her again and up the price to, oh, $5,000. She'll probably again say no. Keep going until she wavers and/or eventually says yes for the amount suggested.

Then, tell her she's a prostitute. She won't like that, but insist that she is. After she gives you a break between the steam blasts out of her ears -- tell her that it has already been established that she's a prostitute, the two of you are just arguing about the price.

[lastchance]

I believe it was Oscar Wilde who put the issue so well.