TOD:
Let boys use the Men's Room and let girls use the Ladies Room.
And if someone thinks she's a boy, so be it.
And if someone thinks he's a girl, so be it.
If one dresses the part, or has surgery to attain (or remove) the part, so be it.
Just do it and don't make a big deal out of it. And use the bathroom of the gender sex with which you identify.
And if I ever use a word like "cisgender" after this sentence, please put me out of my misery.