Even the vulva can't be seen as such in a woman just walking around. You can see about the anterior third of the outside of the labia majora, that's about it. No woman in a changing room will spread her legs in a way that allows even other women to see any more of it.
I get pretty narked about this constant attempt to paint women as having the same exhibitionist tendencies as men. And the same sexual aggression towards strangers as many men exhibit. There are posters here who counter every complaint about the bad behaviour of men with "well what about the women who do that too?"
How to tell us you don't know anything about women without actually saying you don't know anything about women.
I see it as a symptom of some misapplication of women's rights demands, and the push for "equality" in general.
Since the dawn of civilization, people have said, "Women are different from men, so women shouldn't be allowed to......" It has only been about 50 or 60 years ago that most nations/cultures/governments really started questioning that. They rapidly recognized the statement was BS. Unfortunately, some people got the really awful idea that the problematic part of the statement was "women are different from men". So, any policy proposal or just statement of behavior patterns that assert a difference between typical men or typical women is met with some sort of "Aha! Sexism!" response.
Well, physically, women really are different from men, in ways that are at least in some circumstances incredibly important. Behaviorally, typical women are somewhat different from typical men.
The trans ideology of "trans women are women" has taken this to an extreme, but muddled, length. There are, apparently, no physical differences between women and men, and it is, apparently, wrong to claim that there are behavioral differences, and yet it incredibly important to recognize someone as being one or the other, despite not recognizing the elements that would make that recognition significant.