The other day I was counting the pills I take every morning to make sure I hadn't forgotten any. I take sixteen, including the non-prescription supplements (I know, that's a lot). So I put them in four piles of four. Why? Because four is the highest number I can count without counting one, two, three, four, five... In other words, I can look at four or less items, and know how many they are. I can't do that with five or more. Even if it's five. My brain won't look at it and say "four plus one."
I once, many years ago, said this to a co-worker and she looked at me as if I were crazy. So I never again brought it up, until now. See how much I trust you people!
Maybe other people can count more. I don't know. Can you?
I've hidden my shame for over thirty-five years, now. Can you count more than four without counting? Let me know in the comments below.