Ever gotten a bad case of gastroenteritis from a restaurant that made you swear never to go back and even turned you off an entire style of cuisine for, at least, a little while?
A few brushes with bad water might have given folk a strong preference for beer, just to be on the safe side, even if most water was safe.
A few brushes with bad water might have given folk a strong preference for beer, just to be on the safe side, even if most water was safe.