In school, I briefly took a logic course. There was a chapter on “selective memory” which I found disturbing.
As I recall, the idea is, say you go into a photo booth, 10 times. 8 out of those 10 times you get pricked. Likely as not, when you think about going into a photo booth next, you’re going to think or say, “I don’t want to. I always get hurt when I go in there.”
But the truth of the matter is, twice, you didn’t get stabbed and you had a great time. But either a positive or a negative memory has the capability or overshadowing other memories so that really truly in your mind you only remember the negative/positive experiences.
Also, the other thing is you’re more likely to notice when something happens versus when something doesn’t happen. Usually, unless they are being facetious, someone wouldn’t say, “Remember that time you didn’t tell a joke?”