They feasted late into the night and Circe told Odysseus about the Sirens and their bewitching song that makes men drive their boats ashore and perish. She advised him to fashion earplugs for his men from beeswax, but if he wanted to listen to their son he must be lashed to the mast or else he would jump ship to get to them. After the Sirens are the drifting rocks which must be avoided by taking a route that goes past Scylla, a six-headed monster, and Charybdis, a whirlpool.