This doesn't really answer your question about being submissive at a younger age. But, looking back to when I was a young girl, I was dominant in nature. One of my favorite things to do with my dolls was to tie them up and then spank them. Please don't think I'm strange or anything like that, but I would get so much enjoyment and could spend hours doing bad things to them.
You'd never know that I did those things because outwardly, I was a rule-follower and was considered a 'good girl'. I think I began to have stirrings of submissiveness after I graduated from high school. I'm not sure why or how it happened but I do know my personality even changed. The men I preferred to date were strong, they knew what they wanted and they were a bit rough. I liked catering to them, bending to fit their needs. I wanted to be that way for them – it just seemed right.