Is smiling natural or learned?

Is Smiling a Natural or Learned Behavior?

Smiling is not solely a response that is conditioned or acquired through experience. It is, in fact, an inherent action that many people exhibit from an early age, often before they even start to communicate verbally. Although cultural influences can shape how smiles are interpreted or when they are used, the act of smiling itself appears to be ingrained in human nature. Thus, it can be concluded that smiling is largely a natural phenomenon, although certain expressions of it may be refined through social learning.