Submissive by nature or nurture?

Rambling in my head are thoughts about submission and whether or not women are submissive by nature.  I believe this to be true, but is this coloured by the fact I'm submissive?  Am I submissive by environment, raised by a submissive mother?  Am I submissive because at an impressionable age I was exposed to pretty hard core erotica? I was seeking a dominant man primarily for sexual thrill and my