I would like to see a development where people stop seeing race as a biological phenomenon, and start seeing it as a cultural phenomenon more where being of a specific "race" is more like membership of a political party than a matter of biological destiny. However, a lot of stuff in the gender world is a matter of biological destiny. Preferred sex of sexual partner, and matters of marriage are not, in my view, among that batch of stuff.

NickBanglo, I understand your point and we're not too far apart in our thinking. However I would like to see a development where biological phenomena are seen as incidental to identity, rather than fundamental.

Just as I don't appreciate being told who I can marry because of the color of my skin, I don't appreciate being told the same just because of the shape of my sex organs. Biology equals destiny is an easily exploited tautology.

Providing women a safe space to go the bathroom alone because certain men are likely to harass them otherwise, that's a reasonable accomodation of gender difference... a formal policy banning women from owning a credit card in her own name because she's likely less responsible than a man, that's not so reasonable. In fact it's arbitrary, and was stricken down by law on those grounds.

At one point does a policy that is customary become arbitrary?

Maybe at one point in time it was a matter of life and death for tribes to promote heterosexuality and make sure every fertile body was busy churning out babies; new families, new tribe members, new citizens for the state, etc. Perhaps marriage evolved as a way to tie it all neatly together. Perhaps homosexualty was a genuine threat to the future of the pack when we needed as many people makin babies as possible. But most people don't feel that way anymore, and marriage has changed to reflect that. As society evolves so must its institutions.