I get what you're saying and I agree that I will always think of myself as a man till I die, no matter what Mengele did to me :)

But I would also adhere to the social convention of using the Ladies' room if I have a vagina. Because I know (or think anyway) that the alternative is chaos and confusion.

Okay, good - and thanks, BTW, for being a good sport and playing along with the thought experiment.

So let's go to the next step. After speaking to your therapist (understandable after this trauma), they tell you that you have options to ease the discrepancy that now exists between your thinking of yourself as a man and your physical state.

They can't restore your penis. But you can take hormones that will lower your vocal register, let you grow facial and body hair again, and reduce your surgically altered breasts. You can reduce them further using a binder. If you continue going by your name (which is male) you'll be able to live as a man again. While you won't have a penis, no one would otherwise be able to tell you were assaulted by this Mengele.

For your mental health, you do this - you live as a man again, rather than forcing yourself to live as a woman. But now, the chaos and confusion will result if you use the Ladies' room. You appear by all outward signs to be a man. You have a beard, you have the body shape of a man, you have a masculine voice and all the secondary sex attributes of a man.

Now what do you do?