I remember I was only 6 years old and my male cousin who was 16 taught me how to do it. He was stroking and I was watching how to do his techniques. My dick was too small to imitate him, so I didn't do anything until my late 11's when I was just starting to hit puberty. I started to jack off there, with no sucess, not even an orgasm.
Finally when I was 12 and a half, my dick just got big enough to jack off with a full fist. I was nude in the bathroom, sitting on the toilet and then I remembered that lesson my cousin taught me when I was 6 and then I started stroking and stroking. It felt so damn good that I couldn't stop.
When I reached the "point of no return", I felt like I was going to pee, and then a clear (almost transparent) white liquid came out of my dick dribbling in small quantities. I already knew what it was, because when my cousin was explaining me how to do it, I watched him stroking until he came.
Since that day, I masturbate regularly at a daily basis, but there's nothing like the first orgasm. Once in a lifetime.