I was thirteen years old at the time and was visiting relatives for the summer. While in the tub one morning, I wondered what it would feel like to stick my hard penis up the faucet (it was rather large, and I still wasn't very developed yet) while the water was running hard. It was hard to keep my penis in there because of the water pressure but I did, and after about a minute or so the extreme water pressure caused me to have my first explosive orgasm. The intense electric feeling made my eyes go blurry and my whole body limp. I was in shock and I had no idea what happened but I knew that I liked it and knew that I wanted it to happen again! I kept doing this each day for the rest of the summer. After I returned home at the end of the vacation, I tried to repeat the experience but couldn't because we only had a shower with low pressure. After a couple of months, I found one of my older brother's porno mags in our bathroom and one of the articles gave a good description on how to jack off. Finally! Some relief! I've been doing it since in many different ways for 23 years now.