It is happiness which is derived from intrinsic feelings of mankind that attracts a great deal of affectation for an individual from another one. So significant an impact it exerts on our daily social activities that it does not only controls expression of our internal depth to the outside world, but it also delivers feasibility of communication and comprehension between different groups of people, beloved and hate, rich and poor, young and old. It is true that the existence of the feelings of the happy are rooted in some gray tissue in our brains, the central commander of mankind’s nervous system. However, its complicated representation, including feelings of agreeable melancholy and tranquil ecstasy, precludes our oversimplifiedly explaining it only in bioeletrical signals transferred among cells and tissues. Chemical reactions serve as a base system of happiness generation. Moreover, when bioeletrical signals are sent out from our brains, certain kinds of hormone which feed back to our brains and affect our bodies later are manufactured immediately. A complex series of biological reactions are performed implicitly after feed-back signals are accepted. Therefore, a complicated and, perhaps contradict, mood eventually appears upon our faces and please buddies sitting aside.