I certainly wasn't conditioned from birth. Covering up was and still is far from being a part of my family's culture and the way of the society around me back then. In fact I got quite a lot of flack from both my family and others known to me when I chose to dress as I do, around ten years ago. And the same goes to most, if not all, the ladies I know who chose to cover from head to toe as you aptly put it. They all do it by free will and have never had any man dictate to them what to do.
As to why we chose to do so, then this is of cos personal to each one of us so I cannot speak on behalf of everyone. In my case it is due to my religious beliefs. No man had any say in my choice!