The right to mis-define oneself

[Longhorn]

If she chooses to go to a public instituion which allows nudity, like a changing room in a gym, then what? Should other women have to put up with the sight of her penis flopping around in the ladies' changing room?

This is an issue, but what's your alternative? Force her to use the men's changing room and be subject to harassment?

What if she decides to start dating, and she takes a man back to her place? Should the man, upon discovering her penis, accept that she is a woman anyway?

Again with the should. What do you mean by it in this context? That's between her and the guy

What if she has a sex change, and doesn't tell prospective male sex partners her history?

http://transwhat.org/debunked/

Omitting mention of their histories can feel like "hiding" to some trans people, but others prefer keeping the information to themselves, for a variety of reasons. People may think of you differently after you disclose. They might scrutinize your behavior, talk about you behind your back, or exclude you socially. And it's not like people have a right to know, anyway; privacy is privacy. For these reasons, and a lot more, it's perfectly reasonable for people to not mention they're trans.

IOW, it's her business.

I think transgender woman works fine, and I'm fine with "she." But Jenner is not female in many of the ways that this word is normally used. That's a statement of physical reality and simple semantic awareness.

Yes, she's not the same as cisgendered women. Point?