As gender theorists like Judith Butler and Anne Fausto-Sterling have pointed out, sex and gender cannot be fully pulled apart. Facts about our sexed bodies influence the cultural rules surrounding gender… And facts about gender in turn shape our sexed bodies. (For instance, norms of what is attractive lead to different patterns of exercise, like weightlifting for men and running on the elliptical for women.) And these feedback on each other. (When men only weightlift, this creates further sex differences that reinforce our cultural norms.) But despite this intertwining, peacocks still do not have genders. And the reason is that peacocks do not have culture.
Nature vs nurture? Why humans are the only animal that has genders
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