Beating off from the inside... urethral sounding rod and estim. Hands free cumshot.

I start off slowly with just the sounding rod, getting my cock used to the steel. It doesn't take long to make my dick hard and start throbbing. I add lingerie and estim electrodes on my dick and nipples, then start masturbating with the rod. My nipples are buzzing and my dick twitches harder until the cum sends the rod flying along with a rush of cum.