Great question, and one for which I even have an answer, at least for my situation:
I was a "male" for 55 years before we found Tina. Suddenly we realized (my wife and I) that there was a clear feminine part of me. As you might imagine, our main curiosity was how this femininity had played a role in my life all this time, and how we would go forward knowing that Tina existed, i.e. would like change because she was not longer hidden?
So, I dressed to find out who Tina is, and from that to find out who she has been all this time. Well, we found out we liked Tina (my wife the other day said, "Tina is just so sweet!"). So is it a need? How can someone now want to know who they are, so in that sense it is a need. On the other side of it, we both like Tina, so that is a desire.
Lastly, Tina is clearly her own person with likes and dislikes. She has books she likes and projects she enjoys creatively. She really is generating a life of her own. Stopping that life seems a bit draconian! How could we possibly do that?
tina