Why Do We Smile

The video explores smiling as a form of communication, highlighting its role in social interactions. It delves into the evolutionary background of smiling, comparing human smiles to primate teeth expressions. Studies show that smiling influences trust and cooperation, indicating that smiles are more about social bonding than mere happiness. The evolution of smiling from a threat display to a friendly gesture is discussed, emphasizing its significance in human and primate interactions.

In what ways did the 2007 study explore the relationship between sharing and smiling?

How has the perception of smiling changed from a threat to a sign of friendliness?