I love finding research which explains human behavior. It bridges the gap between values I hold in my heart and mind and the understanding science can bring about our physical nature. Understanding how and why we act the way we do allows us to surpass our primitive nature and attain enlightenment.
There is a chemical balance our body creates through social interactions, another state of being achieved in meditation or prayer. We can, with practice and concentration, alter our own chemical composition and therefore, our mood.
8 hugs per day? For the added benefit of overall happiness not only in yourself but in those you interact with; I can manage that somehow.