Reading the experiences of others reminds me of my own.
By the time I was fourteen, I had been masturbating for four years, had seen my penis grow from a three inch hard to six, and did it on average about three times a day. I also masturbated with other friends rather frequently but never with Steve.
This changed one hot Saturday morning, when, during a weekend sleepover at his house, he suggested that we go for a walk in the woods. We were about 15 minutes into our walk when we came to a rather large pond which Steve said was a good place to swim, suggesting that we strip and do a skinny dip. I agreed. As we began to take our clothes off, I noticed that he kept glancing furtively at me as more and more of my body was uncovered. Finally when we were completely nude, he looked me up and down, and said, 'You have a good body, and a lot of pecker hair for your age.' I was a little surprised, and replied, 'About the same as you.' Then we began our swim which lasted for about 20 minutes. The water was rather cold, so when Steve suggested that we get out and sit in the sun, I accepted.
We sat on a log to dry off and were talking about school and our friends when Steve said, 'Want to see something', and pulled a magazine out of his backpack. It was pure porn with pictures of naked girls and women. We both got raging hards immediately, and after a few minutes of looking at the pictures, my peter was so hard it hurt, and I was dripping wet with pre-cum. Steve said that he couldn't take it any longer, and had to jack off. He wrapped his fist around his uncut peter, and began jacking holding his shaft lightly so that his peter head remained covered. I watched him for about a minute or two, and then began stroking my own rock hard circumcised peter. As we got into our first mutual session, he began to grip his peter tightly, and his head was alternately covered and uncovered as he jacked away. This was the first time I had seen this in that my other friends were all circumcised. It was so arousing that I had the hardest cum I ever had, beginning to ejaculate first with a steady stream of milky thin cum followed by great ropes of thick white sperm. My orgasm set off his. He pulled back on his shaft so that his now purple head was completely uncovered, and he shot six or seven thick ropes of cum at least three feet from his peter head. We both got rigid as boards as our orgasms began and remained so for a few seconds after. Then I said, 'That's the best cum I've ever had.'
On our walk back to his house, Steve asked if that was the first time I had jacked off with a friend. I then told him that I had been in a jacking group for two years which he was welcome to join if he wanted to, because he knew all the others. He asked to be included in our next session.