My first orgasm (even before my first wet dream) was via accidental self bondage.

I was trying to get my cock in my mouth, but my dick is small and, even though I was flexible, I couldn’t reach. I put my upper back on the bed, with my legs in the air and my backside against the headboard. I got closer, but still couldn’t get it. I thought I’d try looping a rope around my balls and shaft, and then behind my neck to help stretch and bridge the gap. I was FINALLY able to lick my head! It didn’t last long though. After ~20 minutes of adjusting and straining to suck my own cock I had a sudden urge to pee. There I was: 12 years old, ass-up in bed with a rope binding my cock to my neck and no way to get it undone fast enough before I peed myself. Resigned to my fate, I let go.

It (obviously) wasn’t urine. It was glorious. I came, and I didn’t even know what it was. Because I upside-down, trying to suck my own cock (but not knowing WHY), it all went right into my own mouth. I have craved cock ever since, but never had another.