expalin the myth of " Gyges and King Candaules"

Dunstan tells Percy the story of Gyges and King Candaules, a myth in which King Candaules asks his friend Gyges to examine the queen naked. Gyges and the queen then either murder or depose the king, based on the version of the story. Boy is not amused by the story, though nine months later, Leola gives birth to a baby boy named David. Dunstan later speculates that the conception happened that night, as an expression of Boy's unease with the possibility of being cuckolded.