Interesting! I've not seen that done with a male subject. Though I can tell you it works on the fairer sex. A Domme I had the pleasure of serving in Florida placed a pad on either side of my peritoneum while she fisted me once. When I started to orgasm she twisted the dial and I exploded. It was the longest, hardest, most painful and yet exquisite orgasm I've ever had. How is it done with males?

At any rate, that's a very interesting idea for a story.