Laughing consists of two parts: a set of gestures and the production of a sound.

Why do we Laugh? This is one of the universal mysteries. Given the evidence is so strong that laughter is good for your health, then the next step is to find out why we laugh. In addition to this, most of the things we do have a purpose. So what is the purpose of laughter and why do we do it?

In laughing, the brain pressures us to do two simultaneous things. One is visual consisting of specific facial gestures. The second is a phonic one with the production of certain sound. During exuberant laughter, there is a change in many parts of the body even the arm, leg and trunk muscles.

There are three traditional theories that attempt to explain why we laugh and none of them are only about jokes. While they still contain elements of what we call humor, it highlights the distinction between a "joke" as such and myriad of "humorous situations that surround us". The three traditional theories are the superiority theory, incongruity theory and the relief theory.