I started by lubing up my urethra and fingering it, first with one and then two fingers. After that, I switched to using a smooth glass dildo- you can see it pop past my bladder sphincter over and over. Then I'm warmed up enough for the blue butt plug, which was created as an enema nozzle and has a hole through it... allowing my piss to trickle right out of me as I cum over and over. With that plug in my peehole, there's nothing I can do to hold the pee in! When I decide to have one last massive orgasm, I push the plug out of my urethra as I do. That turns out not to be the best plan, since pee splashed everywhere, including my camera!