People can use smile to show their superiority, to communicate discontent, and to make others feel inferior. One can call it a sneer.

Mechanism: A dominance smile is more likely to be asymmetrical - One side of the mouth rises, and the other side remains in place or pulls downward.

It may also include a lip curl and raising of an eyebrow t, both of which are definite signals of disgust and aggresion.

Studies show dominance smile works.

If you’re trying to find a reliable lie detector, the face isn’t !

According to research , even the most experienced law enforcement officials only spot liars about half the time.

Such smile patterns are commonly seen among people who were actively trying to deceive others in high-stakes situations.

Mechanism: The zygomaticus major muscle — the one that pulls your lips into a smile — becomes very active

The sheer dexterity of human emotion is astonishing. So, we’re able to smile in the midst of both emotional and physical pain.

It acts as a coping mechanism to smile and laugh during the grieving process (emotional/physical pain)

Researchers monitored the facial expressions of people who were undergoing painful procedures and found that they smiled more when loved ones were present than when they were alone as a sign of reassurance.

The list of social situations requiring a pleasant expression is long, one of them is when you greet a person.

Lots of social situations calls for trustworthy friendliness but not emotional intimacy .

Mechanism: Most of the time, a polite smile involves the zygomaticus major muscle, but not the orbicularis oculi muscle. In other words, your mouth smiles, but your eyes don’t.

This might sometimes be difficult to show or understand.

One study found that attractiveness is heavily influenced by intense smile that can “compensate for relative unattractiveness.”

Tips: Some tips are subtle: Keep your lips together and lift an eyebrow . Some are coy: Smile while tipping your head down slightly . Some are downright comical: Smile with a little whipped cream or coffee froth on your lips.

This can be seen in situations of commiting blunders in front of group of people. However, smiling can actually alleviate some awkward scenarios.

Mechanism: A study found that a smile provoked by embarrassment is often accompanied by a downward tilt of the head and a shifting of the gaze to the left.If you’re embarrassed, you’ll probably touch your face more often, too.

This smile gets its name from the Pan Am flight attendants who were required to keep smiling, even when customers and circumstances made them want to throw peanut packets across the cabin.

It can be seen as forced and fake.

Mechanism: they use extra effort to yank on their zygomaticus major muscle.As a result, the corners of the mouth are extra high, and more of the teeth are exposed.

This smile is the gold standard of all smiles.

The Duchenne smile AKA genuine smile make you seem trustworthy , authentic, and friendly.

Mechanism :It’s the one that involves the mouth, the cheeks, and the eyes simultaneously. It’s the one where your whole face seems to light up suddenly.