I Came By Accident

The summer I was 15 and my brother was 13, we were home alone a lot because both our parents worked outside jobs. One day my brother came into my bedroom and complained about being bored. I was looking at that year's Sports Illustrated swimsuit edition, well worn, and I was sporting a semi that was sort of visible through my basketball shorts. "What are you doing?" my brother asked. "Just looking at girls in swimsuits," I responded. He climbed onto my bed beside me and started to look along. I pointed out some of my favorites, making sure to talk about their tits and asses and speculating about what their pussies look like. Suddenly my brother asked, "Do you ever get hard when you think about girls?" "All the time, Bud," I said. In fact, at that time I was masturbating 2-3 times a day and walking around in a near constant state of arousal. "Are you hard right now?" he asked, tentatively. "I am," he added quickly. "Um, yeah," I said, a little embarrassed, but my six inches were tenting out my shorts and he didn't have to ask, really. I looked over at his crotch and he was sporting some impressive wood, too. "Wanna compare dicks?" I asked. He slid down his shorts and underwear to reveal about a four-inch erection with a bunch of curly dark pubic hair at the base. It was quite a bit bigger than the last time I'd seen it, a year or so before, when he'd showed me the first few hairs he had. "Nice," I said, pulling down my own shorts and giving my dick a quick tug. "Damn, you've got a big dick," he said. "Do you ever rub it?" I was torn. On the one hand I was really horny and wanted to see where this was going, but on the other, I'd never admitted masturbating before. "Do you?" I asked him instead. He looked embarrassed and deflected. "Your dick looks just like mine, but bigger and redder," he said. He was right. "Watch this," I said, and gave my dick a squeeze and flexed my hips to make the head even bigger. He copied my movement with his own dick, making it even bigger. I hadn't intended to jerk off with my brother, but here we were, dicks in our hands, and suddenly we were both slowly rubbing ourselves. "This feels awesome," he said. "I've jacked off a few times." "I do it pretty much every day," I admitted. "It's hard to go to sleep until I cum." "What do you mean by cum?" "When you are jacking off, and you have an orgasm, and white stuff comes out of your dick." He looked puzzled. "I've had white stuff come out, but what's an orgasm?" He squeezed his dick and a little precum dribbled out. "See?" "That's precum. An orgasm is...I don't know how to describe it. You've never cum before?" I asked. He shook his head no. "OK, wow." I was extremely hard and close to the edge. I was going to tell him about it, but thinking about cumming suddenly caused me to pass the point of no return. "Shit!" I said. I didn't mean to cum in front of him. I had a powerful orgasm and several squirts of cum flew up onto my belly, where I was starting to grow some hairs. It pooled there. "Whoa!" he exclaimed. "Is that what you were talking about?" I was embarrassed. "Yeah, I didn't mean to, but yeah." He started rubbing faster. "Oh, oh, fuck," he said, then cum flew out of his dick, into the air, and landed on his hand, leg, and dick. "Damn, Ben, that was awesome," he said. "I see why you do that every night." "Yeah," I said. "I usually do it in the morning, too, and sometimes in the middle of the day, like now." He laughed. "I guess I'm gonna start now." I grabbed some tissues from my nightstand and we cleaned up. Just then our mom got home, putting an end to the fun. We never did it together again. I think he was a little weirded out by it. But he did ask to borrow my magazine at bedtime that night, and I was happy to loan it to him.