Why do snakes hiss, seeing they have no ears? Why do they give what they cannot receive? Why do they produce what they cannot consume? Why do they annoy others with the high pitch of their hiss but prefer quiet and undisturbed living?

Who are those who give what they cannot/will not receive? Who are those who produce what they cannot/will not consume? Who are those who enjoy annoying and irritating others but prefer quiet and undisturbed living?

What other things do snakes and them have in common?