Everyone has some idea what a sense of humor is, though he would find it difficult to give a definition or an explanation. We all know what we mean when we say that a person has a good sense of humor, or that his sense of humor is poor. But to say exactly why we think this of him is a hard work.
As good citizens, we want to see a friendly and happy neighborhood and happy community of friends around. It is needless to say that empathetic citizens are the path breakers to make it happen and make our world a better place for us to live.
We can see that numbers are the easiest way of organizing the information, but unfortunately numbers in themselves are fairly abstract. So a system had to be found which would enable numbers to take on flesh and blood.