I had my first wet dream when I was 18 as a freshman in college. Being new to the dorm, with a roommate I did not know, I must have gone over a week without masturbating. One morning I awoke as I was ejaculating. I was surprised as I had never had a wet dream before, but found it very enjoyable.
My roommate was also surprised as he had just entered the room. He found me with most of my bed covers off of me, and my big dick waving up and down then he got to watch me ejaculate. We said nothing about it, then a couple of days later he came out of the blue and said, "Damn you have a huge cock." And that was the last that was said about it.
Soon after that I started to find daily opportunities to jerk off, and I never had another wet dream until I was in my early 30's. Since then I have had 1 or 2 wet dreams every month. It usually coincides with a period of time when I am extremely horny. During these periods, usually lasting a few days to a week and one half, it does not matter how much sex I have or how often I jerk off, I will still have a wet dream or two.