Well, eating the lotus eaters made his crew forget about home,and is addicting. It's the same with the sirens.
both Odysseus and his men were lashed to the ship to control them.
He wanted to experience the singing of the sirens.
Odysseus stuffed his crew's ears with beeswax, and ordered them to lash him to the mast with double rope. That way the crew and ship with Odysseus could safely pass the Sirens and, only he could hear their song but not join them.
Both experiences involved succumbing to temptation that threatened to derail their journey home. Odysseus and his crew were both lured by external forces (the sirens' song and the lotus flowers) that put them at risk of never returning home. In both cases, they had to exercise self-control and resist the temptation in order to continue on their journey.
Yes; the Sirens sang their enchanted song, and attempted to lure Odysseus and his men to their doom.
Because Odysseus has to complete what Circe's has told him to do. It was a test to see is Odysseus had the courage and strength to listen to the Sirens. This would strengthen or weaken his leadership skills to the reader. And of course it strengthened his leadership skills.
They Sing
He was warned about the Sirens by one of the spirits he met in the underworld.
Eleanor describes how Odysseus climbed on Circe's roof to watch the plunders. While on the roof, Odysseus heard the voice of the Sirens in the distance, which tempted him with the promise of knowledge and experience.
the sweet songs of the sirens lead their men to death
The sirens are a danger that Odysseus and his men must pass to return home.
He plugged the sirens ears and avoided the Charybdis