The first time I did it I wouldn't ejaculate like my older friends told me, but it felt good LOL. I started by influence of them talking about it and watching porn.
Since that time, I thought I was not normal, because they used to talk about ejaculating and I didn't know that it came along with puberty, so I would try very often (LOL) to check if I was already a regular human being just like my older friends.
As the months passed by I was getting really upset and worried with that. I feared that I would have something wrong with my wiener to the point of lying to my parents saying that my little penis would "burn randomly and have a very itchy sensation", so I could get an overall medical exam and check if somethings wrong!
Medical exam was ok and I was still frustrated over the fact that I couldn't ejaculate.
When it finally happened 2 or 3 years later (at 12~13) I was so happy that I still clearly remember the scene in my bathroom xD