It’s a serious tip about psychopaths. Those who know me may find out a bit more personal information. But let’s just say through direct experience, I know there is an unmistakable red flag. Even the grouchiest normal people go through a rising level of irritation and anger when you interact with them. Annoyed, growling, PO’d, furious. Psychopaths go from mild disagreement to raging furious with you in a split fucking second. Smacking you in the face is no different from itching their arm. You see this happen even once, you should have as little to do with this person as you possibly can. Unfortunately, some interaction is sometimes mandatory.