What is the function of a explanatory myth?

Explanatory myths, for example creation myths, are devices used by shamans, elders, religious leaders, teachers, and others, to explain in simple terms the things we see throughout our lives. They also quietly teach culturally acceptable behaviors (think Aesop's fables) and spiritual theory (think Noah and the great flood).

Very few five-year-olds can wrap their minds around the "big bang theory," and yet most of them ask "where did the world come from?" An explanation of the science would in most cases be lost on that particular audience, but a story of deity, giants, or supernatural beings has entertainment value, memorability, and starts teaching the young the stories (or myths) of their particular culture.