The amount of suffering and pain caused by the tyranny of human beings over other animals (particularly in food production) far exceeds that caused b… - Steve Stewart-Williams

In some domains, women are more sexually selected than men; one could say in these cases that women have the larger “peacock’s tail.” An example can be found in the domain of physical attractiveness. Women are typically rated as better looking than men, by both men and women. The difference is plausibly a consequence of the fact that, although both sexes care about good looks in a mate, on average, men care somewhat more. This means that, since this sex difference first evolved, there has been a somewhat stronger selection pressure on women than men for physical attractiveness — the opposite of what we find in peacocks.

Language, intelligence, and humor, along with art, generosity, and musical ability, are often described as human equivalents of the peacock’s tail. However, peacocks afford a poor analogy for the role of courtship displays in humans. Other animal models offer a better fit. In a number of nonhuman species — species as diverse as sea dragons and grebes — males and females engage in a mutual courtship “dance,” in which the two partners mirror one another’s movements. In Clark’s grebes and Western grebes, for instance, the pair bond ritual culminates in the famous courtship rush: The male and female swim side by side along the top of the water, with their wings back and their heads and necks in a stereotyped posture. If we want a nonhuman analogue for the role of creative intelligence or humor in human courtship, we should think not of ornamented peacocks displaying while drab females evaluate them. We should think instead of grebes engaged in their mating rush or sea dragons engaged in their synchronized mirror dance. Once we have one of these alternative images fixed in our minds, we can then add the proviso that there is a slight skew such that, in the early stages of courtship, men tend to display more vigorously and women tend to be choosier. However, this should be seen as a qualification to the primary message that intelligence, humor, and other forms of sexual display are part of the mutual courtship process in our species.

[T]he same sex differences in occupational preferences have been found in every society where psychologists have looked for them. In one large study (N ≈ 200,000), Lippa found the differences in 53 out of 53 nations: a level of cross-cultural unanimity almost unheard of within psychology.