I love this book title: Mistakes Were Made (but not by me). The book reports that when husbands and wives are independently asked what percentage of the housework they do, it goes like this:
Wives say, "Are you kidding? I do almost everything, at least 90%."
Husbands say, "I do a lot, about 40%."
The numbers differ from couple to couple, but the total always exceeds 100% by a wide margin. Each spouse remembers in a way that enhances his or her contribution.
Over time, we come to believe our own self-centered lies, and we let those lies shape reality.