According to Greek mythology, sirens (sea nymphs) inhabited certain Mediterranean coastal areas. As ships passed by, the sirens sang such enchanting songs that the sailors, drawn by the music, would jump overboard and drown.
Odysseus was on a ship that had to pass that way. Aware of the powerful allurement of those songs, he ordered that he be bound with ropes to the mast and that the crewmen’s ears be sealed with wax to block out the tantalizing music of the sirens. Having taken such precautions, Odysseus and the rest of the crew were able to sail past without yielding to the lure of the sea nymphs. [Our Daily Bread]