Now there's an interesting question.
Let's suppose a woman, at work as a nurse, in the middle of the night, has an unexpectedly heavy period and wants to go to the women's changing room, where she feels most comfortable, and left her bag, to remove and change her clothes and underwear, and clean up.
She feels most comfortable in a reserved women's room. Not a man's room, or a multisex room.
Let's suppose a man, we'll call him Dr Uptonogood, likes going into the women's changing room wearing a bra under his overalls, and gets into a row with her when she tells him it is a women's room, and he should not be there, because he is a man.
Does the man have more right to use the women's changing room, than the woman?
He and his supporters used to say yes.