I remember the first time that I had an orgasm I was probably about 14 years old. I had been waking up in the mornings with a hard on but didn't know what to do about it. I had never heard about jacking off. I always had to wait until my cock went soft before getting out of bed. Sometimes it took 10 minutes or longer. Anyway, I found that it felt good rubbing my crotch. I would sometimes rub my cock up and down through my briefs or other times rub against the railing on the stairs or other things.
On the big day I was horny and had been rubbing myself when I decided to crawl under my bed on my back. The bed was low to the floor and I was able to rub against the underside of the bed frame. In between the wooden slats was a cloth mesh so I could rub hard against the wooden frame and then ease up against the mesh. This was feeling quite good when all of a sudden I started to feel funny and then the next thing that I knew I was having spasms in my crotch area. It scared me more than anything because I was trapped under the bed and I couldn't see what was happening or move to stop the spasms as moving would rub my cock and set me off harder. When I finally stopped I crawled out from under the bed and checked myself to see if there was any blood. There was nothing as it was a dry orgasm. Because it surprised me I didn't touch myself for several days as I was scared that I had hurt myself. However, I soon got horny again and rubbed myself to a wet orgasm.
I can tell more stories if you like this one.