I was 11 years old and i was starting to feel something of new and pleasurable down there by some weeks. I knew what was happening to me, but not yet did i bellieve to be able to produce sperm too. I "shacked" my dick (still i didn't know who i had to do the "up and down" way) and then i started to feel a "painful" sensation coming from the base of my dick. Then i spurted... And i have understand what was happened to me! ;) Only after i have discovered how to masturbate appropiately and, being now my organs exercited, whitout feel that "pain" anymore.