I had no ideas of Dominance submission before meeting the 1st guy i lived with. My parents were neither Dom or sub, tho' in retrospect, perhaps my mom was subservient to my Dad, but not obviously so.
i think there are many cases when it is a physécal make up, .. eg. i was a C cup at 14, so tended to get years of battering ear drums about my udders and my 1st livein lover happened to be a dominant guy. After 3 1/2 yrs. with him, i was fairly well domesticated to His Life style. Only when he ran out on me, leaving me with all his debts, that i slowly realised a 'Dom.' isn't necessarily someone you can respect.
All couples have a Leader and a follower but which is which can be to do with twist of Fate too?
(blush)