Sex
A French monk wrote a manifesto stating that every woman would agree to sell her body for money.
The manifesto was read by the Queen of France and she invited the monk for a chat.
So, you're stating that every women would agree to sell herself?
Yes.
Me too?
Of course.
And how much do you think I would cost?
500 francs.
What?! Only 500 francs?!
Here you go - you've already started to negotiate.