Michel Houellebecq said this quote

In societies like ours sex truly represents a second system of differentiation, completely independent of money; and as a system of differentiation it functions mercilessly. The effects of these two systems are, furthermore, strictly equivalent. Just like unrestrained economic liberalism produces phenomena of absolute pauperization. Some men make love every day; others five of six times in their life, or never. Some make love with dozens of women; others with none. It's what's known as 'the law of the market.