Each and every culture in the universe recognizes and acknowledges that a smiling is an expression or indication of happiness and joy. Almost everyone of us is given the ability to smile. It could reflect delight, gladness, contentment, inner satisfaction and so on. Of all the facial expressions, smiling is used most often than not. Even babies could start smiling even before they actually have the visual capability to see one on a person’s face. Researches have also revealed that babies prefer faces which are smiling as opposed to those which are not. But do you know how to differentiate a between a fake smile than a real and genuine one? Many individuals could spot the difference, even if they do not know how to define or pinpoint exactly just what the whole difference is.

As a matter of fact, several people could tell that a real smile is genuine and sincere, or vice versa merely by listening to the person talking. Strictly speaking,it should be noted that it takes more muscles in smiling rather than it does to frown. So you need to make use of at least 10, or 5 pairs of facial muscles for smiling, and there are times, as several as 53. Whenever you feel happy, endorphins are unleashed in your brain; and usually this causes to smile. By comparison, even just by forcing oneself to smile could direct to the release of endorphins in your brain and make you feel better, thus happier.

Females smile more than their male counterparts. Younger individuals smile a lot often than older people do. And those who smile the least are males with high levels of testosterone. There are actually numerous kinds and types of smiles, however, the very interesting ones are the fake smiles—also known as the "Pan American" smiles, and the open smiles also referred to as the Duchenne smile. The forced or fake one is frequently utilized by most employees in the service industry towards their clients and customers like flights attendants and pilots as they greet and welcome their passengers and even customer service representatives to entice more customers.

These type of smiles are just being polite and courteous rather than an expression of true and sincere joy and happiness. With the Duchenne smiles, the zygomatic muscles of the eyes and cheek constrict, which causes the skin at the corners of the eyes to crease into what they call as "crow’s feet". At the same time, muscles surrounding the mouth area cause the mouth’s corners to curve in an upward manner. This takes place naturally as an effect of one’s happiness. It is automatic and not thought about. Guillaume Duchenne called it a facial reaction to the "sweet emotions to the soul." This Duchenne smile, is named after Guillaume Duchenne.

He was a French neurologist who charted out more than 100 facial muscles in 1862. He discovered that if a certain smile is real, there are only 2 sets of muscles involved, and those are the ones surrounding the eyes and the lips.