Why do we smile..?

Want to know why? Similing is an act of adaptation. Animals don't smile because they have no problem with adaptation. We smile because we have a serious problem with adaptation. We smile a lot when we are with friends. Money can makes us smile. But not for long. Smile is an heart felt act of human being to another. When we are far away from home we smile less. The discomfort of a place indicates that we are not that adaptive. It is not the place but the people. Fear is a serious act of wanting to run away from an `enemy.' Instead,we cry. Some says of fear as if we are very emotional with something or with somebody. But why the smile? This is because life has been solitary and without a friend and a smile we are just lost in our own small world. So smile my friend to another and make today his or her day! And you know what? Yesterday I dreamt of someone and she makes me smile. Hoho haha.