I wonder how the percentages break down? I suppose ********** people are turned on by the thought of blood/injury/cutting?
I would imagine that most people here are keener on hurting the actual balls, as opposed to the scrotum: I know from personal experience that there are some techniques where the pain just doesn't penetrate enough - things like whipping or any hitting with a light floppy object just sting my scrotum, which doesn't turn me on.
The best hits (in my opinion) are the ones where the surface pain isn't much, but it permeates to the center of my balls - until they're 'clanging' and reverberating like those chinese meditation balls (that's the image I often have anyway).
Oh, and BBP - of course you were missed.:)
helios