If I get hit in the nuts, That gives me free reign to Lay you the fuck out flat!! I dont care if it is a middle school girl. if she hits me in the nuts, she's getting a fist to the jaw. Nut pain aint no joke. I would compare it to giving birth, only sharper
I've nevr hit a guy in the balls. I can't even sit on a guy's lap without worrying that I'm squishing his junk.
RE: seems increasingly "popular" these days to talk about & show guys getting hit there, and it came up a while ago when I was out with my friends. My impression was that it sort of knocks the wind out of a guy, but some of the girls said it can put a guy down and out for like 20 minutes -- even with just a good squeeze or yank!. It isn't like being hit in the funny bone which is a shocking kind of pain. But you can well imagine, for example, a good solid blow to the eye which will result in a gnawing, generalised ache in your head through which life and experience will flow, but only if you let it, really. Nauseating as well. Small, flicking blows tend to be more injurous for some strange reason. That being said: 1) It is hard to hit this area - many men will instinctively catch or deflect the blow. 2) Pain per se doesn't incapacitate. The movie bit in which someone gets hoofed in the pods and goes down moaning doesn't really happen. Closer to life is the person gets in a good shot, at which point in a blind rage the person kicked lays flat the person in question, and then goes down for a small bit to regroup. Do NOT rely on the "I'll just shoe him in the groin" as a fight stopping manoever. Maybe on the schoolyard where there's some degree of "don't kill the other person" rules but not a streetfight. 3) Unless there's very serious and debilitating injury it can usually be shaken off in short order. Do be advised that you CAN cause serious and debilitating injury - a kung fu teacher of mine had a former teacher who cost a student one of his with a mis-timed blow. I liken it to poking someone else in the eye. Few people would take a cavalier attitude to driving a finger through someone else's eyeball and if they lose the eye oh well- whereas people DO seem to be cavalier about attacking something that is a major part of the male endocrine system.
Mind you, castration jokes and assaults to the male groin are considered cutesy and funny and prime time giggle fodder. Strangely enough any female analog (a woman getting hit sharply in the connective tissues attaching the breast just next to the armpit for example, or smacked in the eyeball) would be considered abusive...