About a month after I reached 13, I had my first ejaculation. I had been initiated when I was 10 by an older boy with whom I regularly masturbated, but my first shot was fired at home alone.
I was home in bed just waking up with my usual morning hard, and as usual I began stroking my penis. In the last few months, it had grown to six inches, and I had also grown a respectable mustache-like spread of pubic hair above the shaft. Since I had never shot a load before, I made no preparations for catching a load of come. I was jacking away as usual for about ten minutes when I felt my balls churning as they always did when I was getting close to an orgasm, but this time it felt different. I noticed that the urethra was swollen and I felt like I might pee. This increased the pleasure, and I turned on the lights so I could see clearly what was happening to my pecker. As it always did, it looked red from stroking, but there was a drop of clear liquid budding out of the meatus. I stopped jacking, took my forefinger, touched the liquid, and as I pulled my finger away, a string followed my finger for several inches before it broke. That was interesting, and my pecker was bouncing up and down by itself as it always did just before an orgasm. I resumed jacking, but watched closely. This time when my orgasm began, in addition to the shuddering and gasping, the meatus opened and with every spasm a drop of white liquid squirted out about a foot and landed on my abdomen. After the spasms stopped, I kept oozing come. I guess I must have produced half a thimble full -- not much but a good beginning.