This may not be helpful?
1st, What am I: I am Human / Homo Sapien, my DNA makes me unique from every other Human.
2nd, Who am I: I am Marshall, aka, Marsha sometimes Intertwined, my Beliefs, my feelings, my experiences, my spirit, my soul, also make me unique from every other Human.
NOW, to your question; It is like trying to explain why, I like "Liver & Onions", I just do, most people I know would rather go hungry than eat it. Does this make me a freak? NO, it just means I have different tastes than most people I know.