Paltego at Femdom Resource has some thoughts about sadism and mad science:
I think all good sadists have a touch of the mad scientist in them. They’re not content with making it hurt. They also have questions. How much does it hurt? What about here compared with here? What if I squeeze? Was that a yes or a no? What if I do it again? What if I turn it up and squeeze?
He was inspired in this line of thinking by a pro-domme with a zapper toy who did some detailed testing on him as to where it hurt most:
Oddly enough, despite testing it on the more obvious delicate and protruding areas, I think the final answer was in the armpit. I guess that’s what a good mad scientist does. Don’t waste time guessing or making assumptions. Just jam that probe in and see what jumps.
Elsewhere on Bondage Blog: