A feature for Breathe magazine on a little-known condition called Misophonia. Which is where a sound stimulus such as chewing or pen clicking, triggers a physical reflex and that physical reflex then generally elicits intense feelings of anger and/or disgust.

“In a recent study, MRI scans showed a marked difference in the brain structure of those who have misophonia and in the way their brains react when hearing trigger sounds.” - Julie Ryan Evans, Healthline