People smile for many reasons. Whether they remember something nice, pose for a picture, or laugh at a joke, there is so much that a smile can express. Although smiling is just as simple as exposing one’s teeth, the same is not true for everybody. For some people smiling is something that makes them self-conscious. Whether they have crooked, chipped, broken, or missing teeth, there’s so many possible reasons why people would prefer to hide their teeth behind a tight lipped smile.