Hi Dave,
A warm Aussie welcome to Susan's. You have no doubt come to the right place for friendship and support. It's good to see you have such an inquirying mind. I believe it's one thing that keeps us going.
Being a bit of a late comer to welcoming you to our family, I've had the opportunity to join in the conversation and learn a bit about you. From what has been said, I can only reitterate what Beverley, Stephe, and others have said. Look for, and engage a good gender therapist, and 99% of the other problems simply vanish.
I get the impression you are looking for valid reason/excuse for how you feel. More often than not, there is none. Frightening, I know. It's simply how you were made, how you are and how you will be; given you accept yourself for who you are.
Look forward to hearing more from you in time to come. Keep in touch and let us know how you are coping. In the meantime, be safe, well and happy.
Lotsa Huggs
Catherine