There's always a reason to smile. People smile because they're happy and they can't keep it inside. If human beings were animals -- and they are -- this is the equivalent of a dog wagging its tail when it meets another dog. On the surface, everything is very beautiful. Simply perfect, if I may be allowed to say. But methinks there's more than meets the eye.
What does someone do when he or she is plotting some dastardly deed, and finally figures out what to do? What does a naughty child do when he or she is apologetic when being punished, but turns away knowing that they used their wiles and puppy-dog eyes to get off lightly? What does an avid fan do when the biggest rival his favorite star or team has falters momentarily, giving his side the edge? What do you do when you've finally outdone your friends at something, and you know that deep down inside it kills them that you bested them? The answer to all these questions are the same. Each and every one of these people will smile. So much for the innocence of the smile. So much for the it-takes-many-more-muscles-to-frown aspect of smiling.
The smile is a silent assassin. Beware!