When I was young, probably 6 or 7 years old, I made a decision to not dig my nose for a month just to see how much booger I'll accumulate. I'll spare you with the gross details and just say it felt awesome!
The same year, I decided to not clean my ears for 4 months. Ended up in a clinic with a bad ear infection and a shit load of wax!
My point in telling you this? I was a horrible gross child!!!!