I think personality straits and fantasies were with me from early childhood, although I did not realize them as sexual back then. They simply gave me pleasure/made my mind happy.

When playing Cowboys & Indians, I liked to be caught (the being caught part is VERY important with me *lol*), tied to the pole, and "tortured/examined".
I was very good with withstanding the examinations, but I did not keep resisting in order to keep the information/my friends safe, but in order to keep the punishments going...

I was on more than one occasion told off when playing hide & seek, as I enjoyed being caught too much, and did not bother to hide properly...

As a teenager, I did not fantasize about some actor coming to my home on a white horse, but about a gang of biker brutes hunting me down... I did not even give much attention to any sexual detail, the thrill with me was mainly in getting caught.

When I came of age and my fantasies got more sexual, it was usually rough in some way. Quite rough, even. I pretended to share the softie walk-on-the-beach-at-sunset fantasies of my female friends, but nah, they so did nothing for me...

I thought myself weird/odd/sick until at age 19 my then-tattooist brought me in contact with a submissive/masochistic lady, with whom I spent much time talking... since then, I got comfortable with myself; especially since I realized I am not the only one like that. *G*