The "this is where we can't leave" aspect is why I've been saying that where this will likely end up is that showing (not merely having) a penis in the common areas of a women's changing room will be what's not permitted. It's not as though cis women would have been accepted flaunting strap-ons or prosthetic penises (whether anatomically realistic or not) in those facilities in the past. No one has ever had a penis-showing privilege there, that others are being denied.
Okay but then at that point the whole thing as turned into "Plausible penis deniability" and it is completely and utterly detached from reality.
To paraphrase Virgil Earp "I'm not saying women can't have a penis, I'm not saying you can't carry your penis into the locker room, I'm just saying you can't have your lady penis
out in the women's locker room!"
At that point can agree we've reached absurdity?
Even ignoring that all that does is take us right back to the point that if we're going to do that what's the point is segregating the areas at all?
It's not like a in a public bathroom people are whipping their genitals out and drying them with the air dryers or trimming their pubs at the communal sink.
What are even doing at this point?
"You can possess a penis in the women's bathroom, but it can only be out in the stall for the time it takes to urinate, for no more visibility then it takes to urinate. You only allowed two shakes when you are done, past that it considered both playing with it and putting it on display."
When we reached the point in the debate where we are seriously putting on the table a discussion that boils down to "What is the exact amount of penis exposure a woman can be subjected to in order to expect them to maintain overall penile plausible deniability as graphed on Chart A6, please check your appendixes for further...."
It's a penis. It's not the graphite fragments on the roof of Chernobyl where you can measure exposure to it in milli-rapes. There's no "Well you were exposed to a penis, but don't worry the exposure was low, there shouldn't be any long term effects." Either it's in the room or it is not. I don't think "Well it's there but it's not out so don't worry about" is whether side is going to accept this going to.