My great-aunt Albertina Alaska (I know, I know) did the tour of Europe back in the '20s.
When she came home, the family was quite curious to know how she avoided all those "ills of the stomach" they'd heard so much about.
Turns out Aunt Albertina Alaska was concerned about that as well, so she drank - get this - nothing but Brandy Alexanders. For four months. Breakfast, lunch, and dinner.
We suspect she didn't remember squat about her trip and made up stories to tell the family, but we're sure she had a helluva time.
The only "anal fumigant" I've ever associated with beer has always been created internally not externally; the cheaper the beer, the more pungent the fumigant.