A Dom can come from a past where they have been abused / witnessed abuse. I know. I grew up watching physical and mental abuse and had it applied to me as well.
In my case the efffects were to make me fight against who I am for most of my life. It took a long time for me to mentaly separate abuse and consentual play and finaly accept what I am, a Sadist.

To this date I can not use any form of impact as a punishment, instead I use other means that are just as effective in getting the lesson home. ( and to those that reckoned I was a wannabe wimp for that. Bite Me )
My pet (and my children) is the most precious thing in my world. To witness her growth as she blossomed in her submission has been the greatest priveledge I have ever had. To abuse that, to betray that total trust would be a crime that i certainly couldnt live with.

Just my 2 bobs worth
Paul