I've had very few fantasies, sexually, my whole life, that weren't bdsm related. The first one i remember was me being tied and bound in the middle of a hallway at school, with people walking past, who were allowed to touch me any way they wanted. lots of them said nasty things and humiliated me. the rest just forced me to moan and squirm in front of teachers and the like... in fact... i still fantasize about things like that...