[InsideOutSanta]

"It's a reasonable assumption that most women prefer to share female spaces with other women, regardless of how they look"

This is not a reasonable assumption based on my experience talking to women, and if it was, I don't understand how it would work in reality. Even if biological women preferred sharing the women's bathroom with trans men, rather than trans women, how would biological women know whether they were sharing the bathroom with a trans man or a biological man?

It seems much easier for trans men to pass than for trans women, so allowing trans men into women's bathrooms basically ensures that all men can freely enter them, claiming to be trans men.

[unitol]

> so allowing trans men into women's bathrooms basically ensures that all men can freely enter them, claiming to be trans men.

Any examples of this hypothetical situation actually happening?

If these spaces were regulated by law, and there was a realistic prospect of penalties for males who choose to impose themselves on female spaces, then this would have a significant deterrent effect. The males who say they're women (including males with a transwomen identity and your hypothetical set of males who claim to be transmen) would refrain from intruding.