Granted, movies have a tendency to sensationalize cannibalism, but the good ones are effective because the horror on display is possible in the real world. Horror movies have responded accordingly. Whether it’s tales of uncivilized islanders eating their own as a daily custom, or tales of people being forced to eat others in order to survive, humankind has shown time and time again that it’s willing to devour its own. History is littered with stories about people eating human flesh.