The first time I masturbated, I was 13. It was right after I accidentally witnessed my sister and her boyfriend masturbating each other. Of course I didn't know what they were doing at the time (I was very naive and sheltered).
I came home early one day from a friend's house. Melissa and Keith obviously thought they had the house to themselves, because they left her bedroom door open a few inches. When I came up the stairs, I heard a soft moan. Then it got a bit louder and turned into panting. I thought someone was in pain! I crept over to the door to Melissa's bedroom and saw Keith (age 18 at the time) lay on my sister's bed with his pants around his ankles. My sister had her hand around his penis and looked like she was trying to choke it (that's what I thought at the time!) It looked like it was hurting him. She was pumping her hand up and down, and it sounded like he was going to cry! I was just about to burst into the room and tell Melissa to STOP, then I heard him cry 'Oh yeah, oh yeah, don't stop. Fuck me with your hand!' And then his back arched like he was having a seizure.
I wanted to see what was going to happen next, so I kept standing outside her door. It took him a few minutes to calm down and pull his pants up. Then to my horror, Melissa layed down on the bed and took her pants and underwear off! She said to him 'I am soaking wet and ready to go after making you come!' Soaking wet? She didn't look wet to me! Keith pushed Melissa's shirt and bra up and started to suck her nipple. Oh gross, I thought. And yet my nipples started to tingle. She pushed his head away, and said 'No! I don't need that! I need to come!' He started to lower his head to her crotch and Melissa spoke again, 'No, not with your mouth, with your finger!' Keith spread her legs apart as far as they could go and started rubbing her crotch with two fingers. My sister's eyes looked like they were going to roll back in her head! Her body started to writhe on the bed while he just kept rubbing. Then he took his index finger and put it inside her! That made her go even wilder!
By this time I'm not only feeling tingling in my nipples, but in my privates as well. I didn't know what was happening to my sister, but I knew it was sexual. I couldn't tear my eyes away from his finger going in and out of her. Keith kept saying dirty things to her 'You like it when I fuck you? Yeah, you like it!' Suddenly, Melissa shrieked and grabbed his hand and made him move faster and took her other hand and started rubbing her crotch (which I now know was her clit). She started screaming that she was coming-I thought she meant she was coming out the door, so I quickly tiptoed to my room and quietly shut the door. They never knew I was there.
There I was in my room thinking about what I had just witnessed between my 18 year old sister and her boyfriend. My hand drifted down to my own crotch and it was soaking wet right through my shorts. I put my hand down my shorts to try to figure out what was going on. My hand grazed over my privates and it was the most amazing feeling ever! I took my shorts and panties off and got under the covers. I spread my legs and let my fingers run all over my cunt. I found one specific area that felt especially good (my clit). I just kept rubbing and rubbing. I felt like I was going to explode. I don't think I've ever felt that good before. Suddenly I couldn't rub anymore. The feeling got so intense I almost blacked out! I don't remember making any noise, but I do remember that after I had my first orgasm, there were tears running down my face.
Later that night I did it again, then I woke up in the middle of the night and masturbated again! The next day my privates were kind of sore. But the next day I was back at it again. Every time I masturbated, I pictured what Keith was doing to my sister. Second day of masturbating, I remember Keith putting a finger inside her. So I thought I'd try it. I didn't feel much at first, but I learned that when I inserted my finger just before orgasm, it made it so much more intense. I could feel my vagina walls squeezing around my finger.
I'm pretty sure since that first orgasm, I've had at least one, if not two orgasms every day since then. I'm addicted. Now that I know more about the subject, I've found different ways of coming: the electric toothbrush, the faucet, a thick carrot. I am the queen of coming!