My earliest masturbation memory was when I was about 6. When I was in bed ready to go to sleep, I would have vivid fantasies where I would imagine a city of sexy women who lived in a secret city underground. They all wore masks and dressed in slinky black catsuits and were constantly doing sexual things to each other; kissing, sucking each other's nipples, rubbing pussies. My favorite part of this fantasy is where these women would kidnap a young girl from the 'outside world' and initiate her into their clan. They would do this by tying her down to a large sacrificial-like table while the others gathered around and watched. The girl would be resistant and struggling to get away. Then the leader of the clan would come forward, the sexiest woman in the entire group. She would slip off her clothes revealing her breasts and bare pussy and begin to masturbate in front of the girl. She then went over to the girl and began sucking her small tits as the girl pleaded with them to let her go. By this time the watching crowd was extremely aroused and began to have a moaning orgy. Then the leader climbed atop the table over the girl and spread her big dripping pussy lips, then spread the girl's legs apart and thrust her pussy onto the girl's soft hairless pussy. The girl's moans turned from fear to pleasure as their throbbing clits rubbed together, and they began to hump each other wildly. Then at the same time the girl and the leader reached a screaming climax together, and the girl's pussy began to twitch and squirt against the leader's. When the crowd saw this they all reached their own orgasms.
I would lie on my stomach masturbating to this for hours. I had this fantasy for years. Then one night when I was 14 I was once again rubbing my pussy to it when suddenly the pleasure built and my pussy spasmed with a massive orgasm. At first I thought something was wrong with me, but when I realized how good it felt I did it again and again, and I'm still doing it to this day.