"Childbirth vs Getting kicked in the balls"- Simplified

What causes more pain? Childbirth or Getting kicked in the balls?

Who has it worse when it comes to pain? That now is probably the question equivalent to "What came first, Chicken or Egg?". In one hand, women are left with a task of fitting a watermelon sized fetus in her coin sized uterus. On the other, men complain that even a slightest hit on their jewels (:P) can leave them for dead.So which one hurts more?

Before we start, there was a recent rumor on the internet claiming that when a woman gives birth, she suffers 56-57 del of pain which apparently is equivalent to the breaking of 20 human bones, while when a man is kicked in his balls, he suffers 9000 del of pain which I'm assuming will be equivalent to all the bones of our body and the limit to which a human body can withstand pain is 45 del. Apart from the absurd logic that both  of these events can surpass the alleged limit of 45 del, the unit "del" does not even exist. There was once a unit called "dol" from the Latin word 'Dolor' for pain. So that internet fact was bullshit. Before we can move on further, let's talk about 'pain'. What is pain?

                                                                 Pain is the sensation we get when a specialized group of receptors called nociceptors pick it from a stimuli. Unlike other receptors which fire to sensation like temperature, pressure etc. , nociceptors fire when it has passed a specialized  pain threshold, i.e a certain minimum limit required for the pain to register. Some of these nociceptors react quickly which produce a quick sensation of pain like touching something hot or sharp, allowing us to react quickly. While others transmit more slowly and are responsible for a prolonged pain or a 'dull ache'. 

For males, the testicles are internal organs that have migrated out of the body which have a lot of nociceptors, making them extremely sensitive. Also, testicles are also attached to many nerves of the stomach as well as the 'vagus' nerve which in turn is connected to the brain's 'vomit' centre and this is why when hit, the pain spreads throughout the abdomen. To add to that, the human psychology enhances the pain due to testicles being of the minimal protection and utmost importance, and creates symptoms like nausea, increased blood pressure, heart rate etc.

For females, even tough they are not hit with any direct blow to the internal organs,  the mechanical distention   of the uterine area also triggers nociceptors and causes the same kind of visceral pain, mentioning the fact that labor lasts 7-8 hours on an average including nausea, fatigue and increased tension due to stretching. 

Okay! So obviously both of them hurts a lot due a lot of mechanical stimulation by sending signals to pain center of the brain. But this where it gets twisted because pain isn't simply a physical response, rather it is a partially subjective experience based on human to human. This means that every single individual perceives pain in a slightly different way. And not only individual, it also depends on our mood, alertness or previous experience. And because of that, pain may affect each one of us differently. Due to this, we cannot really confine pain in terms of units, for it may affect us differently. 

Thus, pain is not a stimulus, it's an experience that's different for everybody and, both the events of child birth and getting hit on the balls can hurt a lot! So, we call this one a TIE. Apart from the fact that both the events are completely different, and there are so many variables to consider like age, angle and velocity of the hit, baby size and time of labor etc, a man could receive more pain, and vice versa. The only difference being that one results in a new born baby, while the other decreases the chance of having one! (:P)