One of the most important differences between the sexes is that men are higher in the quality that psychologists call ‘sociosexuality’ – the desire for sexual variety. This means that, on average, men are much more likely than women to desire casual sex. This sexuality gap produces a mismatch between male and female desire at the population level. There are a lot more straight men than there are straight women looking for casual sex, meaning that many of these men are left frustrated by the lack of willing casual partners.
