I had them between onset of puberty and onset of masturbation. Never made a big mess, though. In fact, I wasn't even sure they were wet dreams at first. I'd wake up with a "strange" feeling down there and just a drop or two of wetness that I wasn't sure was pee or what. Finally pegged it to wet dreams when I woke up once again with "that feeling" and grabbed my dick and looked at what was coming out of it and saw the white stuff, and again it was just a few drops.
Once I started wanking (started late at almost 15!) there were no more wet dreams. I got sort of close to "that feeling" once in college when I hadn't wanked in more than a week, but I woke up before anything happenes and that's been it ever since ... I never leave it alone long enough for anything to build up, :biggrin1:
Oh, and the dreams were never sexual in nature. I don't remember what they were now, just that they weren't sexual, which added to the confusion about just what was happening, since it wasn't the "big mess" we were warned of in sex ed and the dreams weren't "sexy."