In the poem, the sirens aren't sea creatures, they are birds with human heads. In this poem, the sirens ask for help. Since Odysseus doesn't have beeswax, he is the only one on the ship that can hear them. They tell him that only he can help them. These bird-looking creatures may have been cursed.
In the poem, the sirens say that they didn't like the song they have to sing. It's more like they are forced. This song has the words "help" in it, which I think are the words that attract