Maybe people's brains are (metaphorically) on a hertz cycle that is perfectly calm/in sync when the outside stimulation as at the same "frequency". It's like w

Maybe people's brains are (metaphorically) on a hertz cycle that is perfectly calm/in sync when the outside stimulation as at the same "frequency". It's like when you try to fall asleep watching/listening to something. Too boring and your mind wanders and you dont fall asleep. Too exciting and you're thinking about things while keeping up with the original thing.