We give boys tractors and girls dolls. We are reinforcing the stereotypical obsessions that they already have, but we are not creating them. This is … - Matt Ridley

The more competitive nature of men is a consequence of sexual selection. Men have evolved to live dangerously because success in competition or battle used to lead to more or better sexual conquests and more surviving children. Women who live dangerously merely put at risk those children they already have. Likewise, the intimate connection between female beauty and female reproductive potential (beautiful women are almost by definition young and healthy; compared with older women, they are therefore both more fertile and have a longer reproductive life ahead of them) is a consequence of sexual selection acting on both men’s psyches and women’s bodies. Each sex shapes the other. Women have hourglass-shaped bodies because men have preferred them that way. Men have an aggressive nature because women have preferred them that way (or have allowed aggressive men to defeat other men in contests over women—it amounts to the same thing).

In other words, cooking encourages specialisation by sex. The first and deepest division of labour is the sexual one.

Such “habituation” is just a property of the way brains work; our senses, and those of grackles, notice novelty and change, not steady states. The female preference did not evolve: it just is that way.