At the age of 12, I was jerking off while rubbing on my bed. I had orgasm (i had already experienced the feeling, so i knew how it was).

I felt something wet against my belly, opened the light and looked: a small wet spot. I thought it was piss but i almost immediatly realized i had my 1st ejaculation (the technical word was unknown at the time, actually ).

I was happy i was reaching sexual maturity, but it took a lot of time before i had real sex....