Nero,
Marco and I were discussing this, and I thought I would chime in here. I don't want to embarrass you, but I am a very straight forward person when it comes to talking about "personal" things. If I am understanding your original post, you are asking about sensation in the "middle" section. I'm just trying to keep it clean because we aren't in the sexuality forum. Marco is probably going to kill me, but I will mention that since I have been sexually active with him, he made it clear from the start that that area was off limits. He says he has never derived any sexual pleasure from there, even when he was with men as a woman. His sexual pleasure has always come from the front part. That is what Marco was referring to when he said "preference", because I explained to him what I thought you meant.
In answer to your estrogen question, getting T injections does shut own your body's production of estrogen. Your inside female parts will just sit there dormant. My opinion is that if they are going to shut down anyway, why not have them removed if you have the funds, because all they are are potential places for cancer to grow. And...if you keep them, then you have to continue getting "those exams". I enjoy being female, but HATE those exams.
I hope I answered your question without sticking my nose where it doesn't belong.
Pam