Differences between women and men.

[DLJ]

I think we're so strongly shaped by cultural gender norms that certain stereotypes become "truths".
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"Strongly", yes. But "how strongly?" is open to debate.

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The "psychological differences" are mostly nurture over nature. Some men and women might naturally buck the normal trends, but most people get conditioned into them.
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I'm swayed the other way (my opinion, I mean, not my sexuality)... genes trump memes. There are plenty of examples of middle-aged men with children who get divorced and come out as gay. And the John/Joan case mentioned in the video below, 33:00.

Stephen Pinker's Blank Slate makes a good case.





Meanwhile, in the largely Islamic Indonesia (my neighbours to the South East) the have 5 official genders:

In contrast to the two-gender system of Western society, Bugis society recognises five genders: makkunrai, oroané, bissu, calabai, and calalai.[2] Makkunrai and oroané are comparable to cisgender women and men, respectively. Bissu are androgynous shamans. Calalai and calabai approximately compare with trans men and trans women.

The role of the bissu (along with the other gender roles not normally found in Western society) exist in Bugis society because it is a cultural belief that all five genders must harmoniously coexist.

... which is nice.