Do you not understand the current concern about women sharing spaces with biological males, whatever they identify as?
Of course I understand that. I think you've read my post as a critical antagonistic one, and it's not meant to be. I absolutely understand about women-only spaces, both legally defined 'safe spaces' and also women's lavatories etc. I don't really want to share a loo with random men. But I also don't want to be part of a kind of panic.
It's just that I don't want this to turn into "Eeek a penis!" - I was thinking out loud about the middle ground between sensible openness about human bodies, and a kind of USA evangelical Christian prudery.
Because I'm pretty much in tune with the radical feminist line on this: as Germaine Greer says, just cutting of a penis doesn't turn a man into a woman. It's what Jenni Murray also says. Of course, one is polite and treats people as they wish to be treated (as Prof. Greer & Ms Murray also said), but there's a whole lifetime of masculine socialisation in a transwoman.
I don't think we're in disagreement. I just don't want these conversations to turn into a kind of prudery about human bodies.
I also posted waaay upthread that a transwoman, only 3 years transitioned, could well (she might not) change the dynamic of a woman-only hen do.
I think the OP is in a tricky position. If it were a female cousin she just didn't like, would she invite her? I suspect not.