The person above me is correct - the theme of the whole story The Tell Tale Heart, written by American Romanticist Edgar Allan Poe is definitely how a human being cannot possibly bear to hide such a terrible secret and live with so much guilt.
The narrator of the story killed a man and buried him under the floor, but he constantly kept hearing the dead man's heartbeats, which is, of course, impossible, but given that he was feeling so guilty for having murdered a person, his mind brought him to insanity.
Look for a Friend
Sam is a little fish. He lives in the sea. He is very lonely. He wants to have a friend. The friend looks like him. Sam sees an ink fish. The ink fish has eight legs. He doesn't look like Sam. So Sam goes away. Sam meets a shark. He wants to say hello to the shark. The shark opens his big mouth. Sam runs away quickly. Sam is tired and hungry. He wants to have a rest. Then he sees a round fish. She says to him. "Hello! Would you like to be my friend?" Sam answers: "Of course! But you are round. I am flat." The round fish days: "But we are both fishes."
Sam thinks and says, "You are right. Let's be friends." They become good friends.
Answer:
They said nothing can fly in the vacuum
Explanation:
Very soon after people managed to make a machine for a flight (airplane) they have explored the Earth in total. Soon they started with ideas of exploring space. In the 1920s Robert H. Goddard made the first rocket that set ideas about exploring space. Goddard made the claim that rockets will reach the moon.
However, there was much doubt among people. T<u>he newspaper publication, The New York Times, dismissed this idea with the claim that nothing can fly in the vacuum – space lacking any matter. </u>
<u>Only after the first man have managed to reach space and the moon have they been convinced this was not true.</u>
From what I could find, Sirens are asking for help. The song they sing is a cry for help. They are described as acting/singing like a "damsels in distress".