My roommate count hit 14 in 2 years and I finally counted the pizza boxes from just one guy
The 6 foot stack in our Portland kitchen was all from Marcus, who moved out in March, and I only realized the number when my girlfriend asked why I flinch every time someone says "just one more slice."
That pizza box stack is a whole mood... it's funny how we never notice the pile up until someone else points at it. I do the same thing with coffee cups at my desk, like oh it's just one from today, except there's a small tower going back three weeks. Same with the "one more episode" thing, or "one more beer," where the count only becomes real when you finally stop and look. Life is basically a bunch of small things you swear aren't adding up until they very much do.