The woman has to understand that an exchange a basic law of political economy is negotiated according to the value the proposed merchandise has for the buyer and not for the seller: she was duped by being persuaded she was priceless; in reality she is merely a distraction, a pleasure, company, an inessential article for the man; for her he is the meaning, the justification of her existence; the two objects exchanged are thus not of the same quality; this inequality will be particularly noticeable because the time they spend together and that fallaciously seems to be the same time does not have the same value for both partners; during the evening the lover spends with his mistress, he might be doing something useful for his career, seeing friends, cultivating relations, entertaining himself; for a man normally integrated into his society, time is a positive asset: money, reputation, pleasure.