When I was eleven years old, I was getting a hard on, but I had never tried to take it farther.
Well, I was in the shower and decided to see how far I could take things. So I worked myself up, and then slowly worked it out. I'm circumcised, so all I could really do was work my hand loosely over the tip at first, but soon I started tightening grip and sliding the skin, just a little bit. Soon I felt my balls tightening and my cock "stretching" as I grew close to my first orgasm.
When it hit, I was frozen. It flowed through my entire body, electric and powerful. I nearly fell down it was so strong. Each wave going through my body and my cock in my hand. All through this, I didn't actually cum. It was the only dry orgasm that I have ever had, despite the fact that it was probably one of the only two times I've ever had a full body orgasm.
Hope you enjoy this story and it might educate some a bit.