I'm not judging the kink, I can see how subjecting yourself to that type of punishment could be exciting.

I just don't know how the subs do it without needing serious medical attention afterwards. There is a reason why athletes wear cups and why self defense instructors tell you to go for the groin. Those things are exposed and fragile!

I ask because there are many videos where the mistress winds up and just unloads on the sub's balls...doesn't seem to be any holding back whatsoever. And repeatedly!!!