I was trying to share my banking passwords with my wife ("in case of emergency" kind of stuff), and I was forced to admit that I had no idea what my bank password was, even though I log into it several times a week. I had to open a word processor and type my username and password for her all at once. The act of typing my username allowed the password to pop into my memory.
I tend to think it's a good thing that I don't actually know my bank passwords - a password manager is much simpler. Having strong passwords for all different banks is a piece of cake when you don't have to remember them.
