The first time I masturbated with another boy was with my cousin. I was 12, and he was 13. Of all strange places, it happened in his family's kitchen. His mother, brother, and sister were all out shopping, and we were home alone. I don't know how it started, but he decided we should compare penises, like boys often do, so he opened his shorts and pulled his out and I did the same, and we looked at each other. Then he moved up close to me, and our penises touched, with the heads rubbing each other. It felt really good, and it was pretty exciting. We were both hard, of course. I was about four inches long, and he was just a little longer. I didn't have any pubic hair, but he had a little tuft of it above his penis.
All of a sudden he said, 'Wait right here, I'll be right back,' and dashed from the kitchen, coming back in about 30 seconds with a tub of Vaseline. He took out a glob and smeared it on both of our penises, then made a fist and slipped it over my penis. Then he pushed his penis in so our heads were mashed together in this slippery sleeve, and he began to stroke back and forth over both out penises.
I had masturbated plenty of times, but never like this. It felt so neat with the slipperiness of the Vaseline and his hand and penis up against mine. I knew I was going to reach climax pretty quickly. Back then I was still having dry comes, but was soon to find out that my cousin didn't.
We were both pretty excited, and I started to come, with wonderful pulsing waves of pleasure, and then my cousin did, too. But he shot his sperm, all over both of our penises inside his fist. He grunted loudly as he spasmed, and sperm dribbled out onto the floor in what at the time looked like a huge mess. It was so neat.
But then we heard his mother's car pull into the driveway, and there was a mad dash to get ourselves put together, wipe the Vaseline and sperm off ourselves and up off the floor. He was still on his hands and knees wiping up the sperm when he mother came in and asked what he was doing. He said, 'Oh, just cleaning up. I spilled some milk.'
As she walked out of the kitchen we both collapsed, laughing. We both agreed, though, that that had been too close a call, and we should only do that again in his room. And of course we did, as often as we could.