Admittedly I will be dating myself, but here goes anyway.  I remember some very mild (by today's stanards) 'sex comedies', as they were then termed, involving actors like James Garner and Doris Day, where the Woman outwits the male in conversation or something equally benign.  I remember being very excited by that at age 12 or so.  

Around this same time, I became aware of an Asian type of dress called a cheongsam.  Pictures of Women in those dresses also excited me, causing me to do the same thing I did after the sex comedies.  

 Then there was the movie The Attack of the 50 Foot Woman.'  That REALLY excited me.  I remember watching it while lying on the living room floor on my stomach, and pushing up and down on the carpet to stimulate my cock.  Of course I was alone in the room at the time.

 Not long thereafter, I graduated from 8th grade, and we had a group photo done (which I still have, from Nottingham School in St. Louis, Missouri in the US.  I was 13 at the time.  I still remember wondering 'which Girl would cause boys (as I then was) the most pain.'  I decide it was 'N.'  I wonder what paths her life took.

 Finally, for the moment at least, there was the song 'Hard Hearted Hannah, the Vamp of Savannah', including lyrics like "She'll tease 'em and thrill em, torture and kill 'em, is her delight they all say..."  Goodness, that must have written by someone into Femdom.

 So...bottom line, I belive I was born with this orientation.  My childhood was quite happy in most ways:  I at least cannot point to anything in my youth that made me a staunch believer in the superiority of Women and the worthlessness of males.