When I was a young boy, I think about 11 or 12 the older boy next door (I think he was about 16) and I were in my dad's garage when he asked me if I played with myself. I told him I did and he asked if I would play with him. He was older and I looked up to him so I said sure. He pulled out his cock and I started jerking him off. He asked me if I would like him to play with my cock and I told him that would be great.
We sat there jerking each other off for a few minutes when he asked me if I would suck him. I told him I wasn't sure what to do, but inside I was so excited by the thought I knew I wanted to. He told me to just suck it into my mouth and keep moving up and down on it. I did as instructed until he grabbed the back of my dead and pushed down real hard. His cock went about three inches down my throat and I gagged and pulled up off of him. He said he was sorry, but it was feeling so good he just got over excited. I told him it was O.K., that it had just surprised me but I would be ready the next time. I started sucking him again and I couldn't believe how much I was enjoying having his cock in my mouth. I sucked him for about another ten minutes. He shoved his cock down my throat several more times, but I was ready and just kept on sucking. I was so proud. Here was this older boy next door that had some pretty girlfriends and he was letting me suck his cock. Finally he told me he was going to cum. I had not been able to do that yet so I wasn't sure what he was talking about. The next thing I knew his cock was pumping this thick liquid into my mouth. It tasted pretty good so I just kept sucking. We did this several times a week until he moved a few years later. I really enjoyed sucking his cock and when he told me none of his girlfriends ever made him feel that good I would want to suck him more.
I have never sucked another man cock but sure would like to. I know I'm not gay because when I get my cock inside a woman's pussy I can't imagine anything feeling better. But to have a big cock explode in my mouth is just kind of a secret fantasy.