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You are so fixated on the "sexual" aspect of this, you totally fail to understand any of it.
Yes, I wanted to change my body at age five. It didn't occur to me to cut off my own penis, but I wanted it gone.
Your choice of the term "mutilate" amply illustrates your extreme bias in this case. The whole point of gender transition is to live in society as one's self. The surgical aspect of it is a detail -- a gratifying and important one, but a detail none the less.
Repeat -- you don't know what you're talking about. At all.
I will not debate you any further. Finis.