As a guy, I’ve never had more than a glancing blow, but even those were surprisingly painful. The thing is, it’s a different kind of pain from anything else. There’s pulsing/throbbing pain, dull pain, sharp pain, there’s that sort of stabbing pain that’s paralyzing. The odd part, at least to me, is that different kinds of pain can actually less, but be far less bareable, whether because of the kind of pain or because of the location. And that’s where the nut shot is set apart, it is a completely different kind of pain from anything else I’ve experienced AND it’s in a particularly vulnerable spot, so it takes very little real pain to actually be debilitating. But also because of it’s sensitivity, I can only imagine that the upper limits of that pain are as high or higher than other pains I’ve felt, and thus even more debilitating.
The other aspect is that, as mentioned, while there is the immediate and short lived intensity of the pain, it has lingering after affects in a sort of non-localized somewhat less but more widespread version of that pain through the abdomen, nausea or possibly vomitting, fatigue and weakness.
Either way, I think the only real way to compare the two is to try to estimate it relative to other intense pains that we’ve felt and try to come to a baseline. I’ve often heard that both men and women will say that a kidney stone is more painful, but I’m also of the understanding that kidney stones can be more painful for men because of the anatomical differences in the uretha. So I’m not sure how good of a baseline that is either.
So, my thoughts are that, in general, getting kicked in the balls probably has a more intense and debilitating peak, but even the after affects are over fairly quickly unless it’s particularly brutal. Child birth, on the other hand, is probably not much less intense but lasts considerably longer, and so it’s sort of like comparing a drag car to a NASCAR.
The other substantial difference between the two that I think actually plays a considerable part is the manner in which the pain is received. That is, childbirth is more or less expected and mitigatable. A woman makes a choice and has time to mentally and physically prepare for it and can receive medication for it. A man, on the other hand, never expects it and it’s over before any of the pain can be mitigated, so that probably adds a fair amount to the intensity.