I have a friend who has an analogous “goldfish philosophy” for giving grumpy people the benefit of the doubt: when someone acts like a jerk he says “maybe their goldfish died this morning” and then forgets the incident as fast a goldfish would. You never know who’s having a bad day and he genuinely doesn’t take it personally. Of course sometimes he jokes that a person is a “goldfish serial killer” which means they’re a confirmed jerk.