Thank you for sharing your story, Louise! I especially appreciate "I am who I am, now, today. Nature or nurture is irrelevant." I have no idea what makes some people cis and other people trans, and honestly I don't think it matters - for me, the need to transition was simply a reality. I could either choose to act on it or choose to pretend it wasn't there, but I couldn't make it not exist - and even if I had perfect scientific knowledge of the processes that create the subjective sense of gender, I still would have had those same two options.