I started rubbing myself when i was really young and i don't really remember thinking about anything, it was sort of a nervous habit? or it just felt good...anyway, my first fantasy was when i was fairly young (watching cartoons) and it was about being kidnapped by some evil villain on the Thundercats cartoon show. I was tied spread-eagle with rope to a huge rock and i don't remember if i was wearing clothes or if they were all wet for some reason, but I remember that I felt really vulnerable. Then the thundercats (all big/strong half cat people, men & women) would come to save me and decide not to untie me right away. And they would question me about how i let myself get captured and threaten to tickle me and stuff. I remember masturbating to this fantasy, though I really don't think I got further than that. Just some bondage and teasing...but I was young...I've gotten lots more ideas since.