Get a vascetomy!!! Then you'll see that feeling pass right through your abdomen and up to your eyeballs!!! I did it last November and had a helluva experience with it!
Seriously though, the thread caught my eye because I'm very Dominant in my relationship and I'm the one that does all of the whipping, nipple clamping, spanking etc... But I have to admit, I do like the balls abused. Fortunately she figured this out pretty early on. If she's in the mood and I'm not, she knows all she has to do is dig those nails in and give a few good yanks and I'll be ready to swing into action! There's a fine line, but if you get a partner who is willing to be patient in figuring out where your line is...it is awesome play. Half the fun is finding where those limits are. For both of you