One reason for wearing a mask is to pretend to be someone or something
else. The mask can be a kind of language that expresses the emotion
of the figure one chooses to create. When one sees a person wearing
a mask depicting a happy expression, what do you think it means?
It may infer several meanings. It may convey the mask wearer's genuine
happiness to other people, and make them laugh, or it may mask,
or hide, the wearer's real emotions, such as unhappiness. Some masks
may serve more than one purpose.