"I can't be bothered to update my signature" - you could fix it in half the time it takes to post here. It's just a weird... I'd say flex, but it's the opposite. It's like a sag or deflation.
For some reason, I never used the "save login info" feature as a teen, I didn't trust that it was safe, so I typed it every time. Hundreds, if not thousands of times over the years. So even after 15 years or so of not using it, I still remember.
For some reason short strings of digits have always stuck really well in my memory. I still remember my high school locker combos and every phone number I've ever had.
I taught my kids our address and my telephone number through songs when they were little. Music makes learning abstract things like that way easier. I teach the quadratic formula wihh a song to my Algebra students every year.