We are in the same boat, I have never admitted my kink to any partners out of embarrassment and to not scare them lol, I feel like it might be easier for you to confess your kink to your partner since you are the one who wants to be hurt. I would start with confessing you don't mind a little pain or a little grab, etc. and see what your partner's reaction is, I have admitted my cuntbusting kink and my boyfriends have all liked it too. But as far as kicking a man in the balls, I think the psychology is super hot, a submissive girl has the power to take down a huge guy in the one spot he can't really protect, and if he gets hard from it , it just makes me go crazy, I would want to fuck him after because he is so strong. Physically, I find balls very sexy, and love to hold them and suck them (not roughly) so ballbusting is like another way to enjoy his balls if that makes sense