I didn’t exactly enjoy writing this for PopSci, but I did learn a lot: https://www.popsci.com/health/how-gross-is-biting-your-fingernails-bacteria-fungus-saliva-gums-teeth-damage/
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Layers of stupidity
Calling Lake Ontario “Lake America” is stupid for the obvious reasons, yes, but also for historical ones.
Don’t mention this to dentists who are always trying to get their patients to floss. Putting your hands in your mouth can’t be much better.