Put simply, the FAE is a tendency that we overestimate how much someone’s personal attributes are influencing their actions, and we underestimate how much that someone’s situation is influencing their actions. Sorry to break it to you, fellow earthlings, but humans make a lot of mistakes that we are not always aware of.
Lifelong relationships can be beautiful in their evolution and growth, especially when you have so many memories that you share. They can also be extra challenging. Let’s face it, who pushes your buttons better than Grandpa when he asks you when you’re going to have babies?