When I was younger, I lived somewhere that was not the most sanitary. Adults always warned us that if we don't wash our hands, we'd get worms. A few of my classmates did get worms. And then I saw a documentary about people getting worms because they didn't wash their hands. All of that still disturbs me to this day.
Because of the horror stories of what would happen if I don't wash my hands, I almost compulsively washed my hands from a young age.
Now, though, I'm starting to realise in some cases, it's okay to not wash or sanitize.
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Life ... that's what leaves the mess. Mad people everywhere.