I have talk to several of my friends and most had their first ejaculation from masturbation.All of them say they initally had fear that they broke something my experience was very similar.I was about 13 and had just started getting a few pubic hairs. I had saw a rated r movie of a man and women having sex.When I when to bed I imitated the guy moving his hips. I had a very intense pressure behind my nuts that just continued to grow and grow.If felt like I was going to piss but it felt to good to stop.The pressure at this point was almost unbearable and finally I felt something release inside me it was so intense that I actually stopped mid orgasm.I thought I broke something and reach down to feel something wet and sticky.i vowed never to do it again.HA! The next night I did it agian only I thrusted until the end of my orgasm. Several months later I finally figured out what was going on.Funny part was I had the most intense almost unbearable orgams my first year of masturbating.Either I got use to it or they just were as intense as they were when I was 13. What was your first ejaculation like?Did you know what to expect.What did you think when you saw your semen?