Roxane Gay said this quote

Life, apparently, requires a trigger warning.This is the uncomfortable truth: everything is a trigger for someone. There are things you cannot tell just by looking at someone.We all have history. You can think you're over your history. You can think the past is the past. And then something happens, often innocuous, that shows you how far you are from over it. The past is always with you. Some people want to be protected from this truth.