Standup and cum - slapping balls to estim hands free orgasm

My cock and balls are bound in silicone bands. Estim power to my balls and cock along with a good slapping. My balls are swollen and sore. Every blow from the slapper crashes straight through my balls to my dick. There's also a huge vibrating dildo in my ass. For good measure, I grab my balls in both hands and try to crush them a few times. A little more electricity, and my dick twitches itself into a cumshot. HFO.