I dont need to make my slaves Penis and testicles hurt to make him resent being a man. Any part of his body will do, how-ever I tend to gravitate towards a mans nipples since I inherently understand how sensitive they are.

I start by slapping his chest, bringing the into his nipples and enhancing their sensitivity before I go on an all out clampfest. Pinching and squeezing them. Watching my pathetic slave squirm in agony! And then I light a cigarette and find a few ways to really enjoy!