When I was 12, my older cousin Anna, who was 17, was staying at our house for the summer. We had been at the pool for most of the day, and we came back to my house and were changing back in to our clothes. I had already got my bra and panties on, but she kind of lingered with her clothes off, standing there for a while completely naked.
I was intrigued looking at her fully developed breasts, as mine were just starting to grow, but particularly her perfect triangle of pubic hair-my pubic hair had just started to grow, and as I kept looking at her triangle, my clit started to swell and began to feel sweet.
She asked me if I had ever masturbated, and I told her that I had-she then asked me if I had ever had an orgasm, and I told her that I didn't think I ever had.
She told me to lay down on the bed-I did, and she laid down right next to me. She pulled my panties down around my knees, and pulled my pubic area way up toward my navel with one hand, making my clit stick out from under the head. With her other hand she took my index finger and licked it, then placed it right on the head of my clit-when my wet finger touched it, I let out a loud 'ahhhh' because it felt so good, and closed my eyes.
Anna then moved my other hand around and showed me how to keep my pubic area taut so that my clit stuck out from under the head, and showed me how to dip my figer in the mouth of my vagina to keep lubricating my clit as I rubbed it.
She then skilfully reached around and unhooked my bra and loosened it-my nipples were already hard, and she began to scratch them lightly with her nails and pinch them-the feeling was so intense in my nipples that they sent shock waves down to my clit and made me moan-I could already feel the rise to my very first orgasm-the more she scratched my nipples the harder they got, and the sweet feeling in them was almost as strong as in my clit-she really knew what she was doing!
I kept rubbing my wet finger over my exposed clit, and after about 10 more seconds the sweetness in my clit was so strong that I thought I would faint from it, and I opened my mouth and groaned loudly as my whole crotch was flooded with this intense pleasure that was so strong that it literally hurt.
After I came down from my orgasm, Anna laid on her back and began to rub her clit, and almost immediately raised her hips off the bed and started to moan out her own climax.
After that day we regularly masturbated together, laying on my bed close to each other. I loved to pinch and scratch her nipples as she rubbed herself, feeling her nipples harden under my fingertips, and I learned just which touches of my nails and fingertips would make her groan. We masturbated together every day until she went back home at the end of the summer. Hardly a day has gone by since then that I haven't given myself an orgasm with my own hand. I'm completely hooked!