To my mind, there are three main reasons we like spanking so much. The first, almost everyone knows. The second, most people are familiar with, even if they have not put it in specific terms. But the third and most powerful reason is the one that is least understood.
The first reason is the endorphin effect--those natural, friendly little chemicals our body makes for us. They reduce pain, plus they give a certain high. They take a while to build up. That is why the warm-up is so important, unless you are intending a true punishment spanking. The endorphins allow us to take more spanking, they intensify the pleasure of climax, and the greater amount of spanking allows a deeper, more long lasting afterglow. Great.
The second reson is the effect of reward. If we engage in spanking shortly before climax, or if we even fantasize about spanking before climax, then those activities are rewarded by the climax itself, and so the cycle builds and we find the real or fantasized spanking even more attractive. It stands to reason.
But the third and biggest reason is genetics. The genes we happen to be born with have a huge effect on what we look for, what we notice, and what we do and do not like as we go through life. For some of us, spanking will be unusually attractive, both as an activity and as a fantasy. This is why so many of us found spanking attractive, special, even magical long before we even know what sex was. Quite simply, we were born with this desire, and very likely we will always have this desire.
Why do I say genetics are the biggest reason of the three? Well, if it was mainly the endorphins, we would find ANY kind of pain attractive, if given slowly and repeatedly. But how many of us would be just as likely to develop a taste for being burned with matches or having our arms twisted or whatever? It matters what produces the endorphins, and in our case, that something must be spanking or something similar to it.
Continuing this line of thought, if it was mostly the reward factor that made us like spanking, then it would be easy to turn our vanilla mates and lovers into spankers and spankees who heartily enjoy the task. If they spank or get spanked first and then experience the reward of climax, will they then start WANTING to spank or be spanked? Would this effect be so strong that if they left us and went to a vanilla lover instead, they would want to get the new vanilla person into spanking, too? Nope! And most of us did not have some early spanking experience that was rewarded and suddenly turned us into spankos.
The reward explanation doesn't entirely hold water. We may treat our mates and lovers well enough that they will humor us with reasonable enthusiasm, although many will not, not matter what else we do for them. But those of us with mates and lovers who really WANT to practice spanking are rare and fortunate.
The fact is, most of us were born this way, and no matter what we do, we will always be this way, so we can either feel guilty and try to pretend we aren't this way--or we can own it and enjoy the hell out of it. I vote for enjoy it! :-)