For however long it lasts, here is a link to a YouTube video of a man dropping his trousers for a zapping swat with the electric bug-zapper paddle.
From ErosBlog, used with permission:
I just don’t think about balls enough. I’ve seen The Humbler in femdom porn, but I don’t think I ever quite imagined someone doing this to the balls that might be caught in one. Evil!
( source link )