When I was about 15 there was a guy around the corner from me, we grew up together in a way. I used to go round to his house from time to time. He used to sleep in a room not attached to the house. We used to muck around a bit. He was two years older than me but I was more developed. One day he was vaccuuming his room, when he decided to use it to give himself a head job. He had a rather large cock, his head could barely fit in the tube of the Vac. He asked me if I wanted a turn, I said yeah, Ok. I had this raging boner, and he put the vaccuum up to full power I blew within a minute.
Over time we would continue to masturbate together, stroking each others cocks, until it came naturally time that girls would take over our lives. But even to this day feeling his hard cock in my hand and the sensation of being jacked off by him, gets me hard. I've never been near another guy again.