If Odysseus goes to bed with Circe when she first asks, she will 'unman' him, that is, she will cut off his penis. Hermes tells Odysseus to first make Circe swear that she will do him no harm before he sleeps with her.
In the island of Circe, Odysseus' men are turned into pigs by the enchantress Circe. With the help of Hermes, Odysseus resists her magic and convinces her to turn his men back into humans. Odysseus and his crew then stay on the island for a year, enjoying Circe's hospitality before continuing on their journey.
He doesn't escape, he's let go. After Zeus says it's time to send Odysseus home, he describes what will happen on this last leg of the journey. Then, he send Hermes to tell Calypso it's time to send Odysseus away. She gives Odysseus some tools, they go into the forest and he builds himself a ship. She gives him some cloth, he makes sails. She supplies him and send him on his way.
She thinks Odysseus will forget about his home and family and stay with her.
Something
the sirens couldn't eat him.
It has already happened. Odysseus and his son kill them all.
he got back to his kingdom, son, and wife
The two monsters need to be specified.
Melanthius believes that Odysseus will never return and reclaim his throne, allowing him to continue his disloyal behavior without consequences. He is confident that he can align himself with the suitors to maintain his position of power in the absence of Odysseus.
he told Odysseus that if him or his men touched the cattle they would be punished and killed by Helios, the owner of the cattle. Odysseus's men die before they reach their homes.
Odysseus goes to hades because he was told to go see the blind prophet tiresias who would tell him what would happen and what to do.
he says that they will be avenged by zeus- which they are.