Post-Apocalyptic Personal Hygiene: Brush Your Teeth or Die.

It seems to be the common perception that in the post-apocalyptic world everyone will be happily filthy and there will be a beautiful sea of unwashed masses who eat grubs and live in abandoned basements.
This hypothesis overlooks the fact that for the last 100 years or so people have gotten used to being clean and coddled. The issue of personal hygiene is not simply about comfort, it’s about safety and survival. Do you want to be the asshole who died from an infected pimple or an abscessed tooth?
Many of the daily grooming habits we’ll have to do without are things we’ve grown so accustomed to physiologically, that once they’re removed from our daily lives there will be a noticeable and traumatic impact.