Contrary to popular belief and hope, people don't usually come running when they hear a scream. That's not how humans work. Humans look at other humans and say, 'Did you hear a scream?' because the first scream might have been you screaming inside your head, or a horse backfiring.
Terry PratchettThe conversation of human beings seldom interested him, but it crossed his mind that the males and females always got along best when neither actually listened fully to what the other one was saying.
Terry Pratchett