This is a great article.
"What makes female sex so valuable? The ultimate reason lies with evolution. Evolutionarily speaking, man's investment in the sexual act and the risk he is taking are minimal. On the other hand, his pleasure (orgasm) is guaranteed, and each sexual encounter increases his chances for more offspring. The female’s investment in a sexual act and the risk she is taking are in contrast very high (the risk of death from complications of pregnancy or childbirth), her pleasure is not guaranteed, and having sex with multiple men does not increase her chances of getting more offspring. Therefore, sex for men is a no-risk/high-profit investment. For woman, the equation is reversed. Thus, the supply of female interest in sex is reduced, and since male demand is high, the price rises."
https://www.psychologytoday.com/blo...ce-sex-women-rule-men-drool-the-markets-cruel
"What makes female sex so valuable? The ultimate reason lies with evolution. Evolutionarily speaking, man's investment in the sexual act and the risk he is taking are minimal. On the other hand, his pleasure (orgasm) is guaranteed, and each sexual encounter increases his chances for more offspring. The female’s investment in a sexual act and the risk she is taking are in contrast very high (the risk of death from complications of pregnancy or childbirth), her pleasure is not guaranteed, and having sex with multiple men does not increase her chances of getting more offspring. Therefore, sex for men is a no-risk/high-profit investment. For woman, the equation is reversed. Thus, the supply of female interest in sex is reduced, and since male demand is high, the price rises."
https://www.psychologytoday.com/blo...ce-sex-women-rule-men-drool-the-markets-cruel