I was thirteen at the time.
I knew about ejaculation but thought it only happened during sex and didn't think it was possible any other way.
I was watching a late night programme because I couldn't sleep. It was about sex and had a woman wearing nice panties, no top with suspender belt...I got really desperate for toilet and it hurt a bit. When I went, a bit of really bright yellow sperm came out. I thought nothing of it but knew what it was. I couldn't watch the entire programme without feeling the feeling, and needed to rush to the loo and go to the toilet to let the sperm out.
I thought nothing of this. Later on, a programme called 'Stark Naked' started which involved nudists, and showed couples walking naked through the jungle.
I had never seen anyone fully naked, apart from when I was eight when an eight year-old girl showed me her vagina, but it wasn't sexual when I was eight.
Again, I got the feeling and rushed to the loo where a lot more sperm came out. It was like going to the toilet, but with a simular orgasm feel. My muscles couldn't have been that tight as I never had masturbated but it kinda just flowed out. This happened five times during the programme without touching and I'd always go to watch it for this feeling.
When the 'no touch orgasms' became less, I decided to try to make it happen so I thought that a penis goes into the vagina, so if I make the vagina shape with my hands, (I had seen drawings in books) and cup it with my rounded hand, I might be able to have the same feeling. All that happened, was a bit of semen came out (pre cum) but I knew I was on right track.
When I could no longer orgasm without touching, I tried watching the sex programme and rubbing while watching it, but couldn't orgasm. I put one leg into a pair of pants and used the other leg hole to go around my penis and pulled it more rigid rather than be erect against my tummy. After a while, I had my first proper orgasm that felt like an orgasm and it was wonderful. I came so hard and for so long. My penis had grown from a normal seven inches, to about nine inches. I was so horny that I became huge and was three hands in length (even then I had big hands).
Anyway, that was how I found out about masturbation. I only found out the name when I asked Mum if what I was doing was ok, because I thought it was only done during sex. She said a lot of people do it and it's called masturbation and is totally normal.
I wish I could orgasm without hands now but it's impossible, but I look forward to when I find a girl who can give me a handjob and I look forward to giving her an orgasm, too.
I hope you liked the story.