Earlier quoted context omitted.
The toothbrush is a moot point if you have a separate be bathroom and toilet. If they are combined the spread of fecal particles is curbed by flushing the toilet with closed lid. And in the end the toothbrush is flushed before using and then coated with toothpaste, which often contains detergents and microbial agenda, and which is finally flushed out. I don't think you can conclude from that incident that all soap is…
My point was that you seemed incredibly positive that Japan houses o'clean, and the rest of the world is as apes, in caves, picking parasites off of each others backs. This obsession with shoes, doesn't cover the fly droppings, the dirt upon clothing, and the fact that your body is always covered in bacteria, your gut filled with bacteria, your lunch covered in it if you ever eat fresh greens, you will die without ba…
I was simply explaining a foreign culture where removing shoes when coming indoors, and In confused that somehow my familiarity with these traditions is somehow indicative of my life experience or familiarity with microbes. Quite strange indeed. Lets clarify these assumptions.
In fact I was raised in a ranching and dairy household with over 600 head of beef at the dairy, and about 1600 head of beef at the ranch, each of which was owned or managed in various stages by my two grandfathers. Ihave previously lived for a few months less than a full decade in the middle of actual jungle in one of the rainiest locations on the planet without any infrastructure - literally a mile from the nearest paved road, and 3/4 of a mile from the closest vehicular access point with long periods of the year being closed off from that by high water on both sides. No power lines, no water lines, and out of the reach of cell service, so gasp, no internet!
During that time my wife and cared for over twenty goats and about a six pigs. We did all of our laundry by hand with a cranked wringer and buckets and lived principally off of what we could grow, harvest from the jungle, or milk from the goats and did nearly all of our cooking with self harvested wood, a mix of guava, eucalyptus, and mesquite/locust. In those years I have shoveled literally metric tons of goat manure out of sheds built from recycled building materials, one of which incorporated lumber from the shipping of mirror segments to the Keck telescope. As for microbiome knowledge, I have made a living at times from my skills as a microbiologist. I have designed, built and used laminar flow hoods and sterile glove boxes for the isolation and identification of lambic brewing strains for award winning beer produced by two different local microbreweries, have prepared mushroom spore and tissue cultures in agar and liquid media, have cultured cheese and meat preserving lactic cultures (the dusty white wrapping on many different sausage varieties are examples of these lactic cultures) and to make cultures for lactic fermented pickles and kimchi intended as farmers markets and restaurant products with appropriate safety testing which has included sequencing, PCR and gel electrophoresis techniques. I routinely start sourdough cultures for home use and to share, and yesterday started a live ferment chili salsa that will be ready for probiotic consumption in about a week. I'm away from my home kitchen at the moment, but my kombucha polycultures are at a friends house, and my dry aged lactic cultured wild boar leg quarter is hangin at another friends farm awaiting my return.
I have also produced antifungal and antibacterial fungal metabolic products for veterinary use, and have collected, cultured, and sequenced coliform specimens from near shore runoff for submission to EPA wastewater monitoring as part of federally funded grant programs, having been the program designer and submitting author for those and other awarded STEM and educational grants. So, i am not unfamiliar with the beneficial aspects of microbiotic life forms and their importance to all functioning ecosystems and human life.
My Japanese culture experience includes 32 years ago years at rice farms and seaweed farms, and I am very familiar with the 'dirt' to which the common agriculture worker is exposed to in every day life. However, the differentials that I have personally observed include beef ranches in the US Southwest, Hawaiian beef and sheep ranches, and dairy operations in Japan is that the separation between the conditions in the barn and stockyard are more strenuously partitioned in Japan than elsewhere. It's not that I'm unfamiliar with 'muck', but that I was trying to explain that it is actually common and not very much effort at all for a culture, which has a strong tradition of separating their own dining space from the trough in the barn, to do so.
You are certainly free to convey whatever level of dirt you find reasonable into your own dining space, but please, don't feel that a high acceptance of dirt at mealtimes makes for a greater lifespan through immune system effects. The outdoors will provide all the challenge necessary for proper function without it being present inside the house.
But please, don't feel that I think people who wear outdoor shoes into their own kitchens are parasite ridden or otherwise uncouth, that image nor intent was never in any of my explanations of the how and why for Japanese shoe etiquette. Nor should you infer that I am dirt averse in general, only that I prefer not to have it on my own tatami mats or in my own house. The microbiome of the world is essential, but my personal preference is that dirt as well as cats and the rats they chase should remain outside of my own sleeping quarters.
As for fly droppings, the solution to those is to not allow an accumulation of the growing conditions for maggots to persist in close proximity to ones's indoors spaces, and to otherwise keep the screens on doors and windows closed. No flies will resolve to no fly shit, and a fly swatter plus a dilute peroxide\or\bleach dampened cloth will sanitize the mess for when they wander in from somewhere you cannot control, like the barn or an accidentally uncovered compost pile. Again, fly shit outdoors, no problem. On the walls, tables, and inside windows of my own home, nearly fully preventable and absolutely manageable.
I might type long expositions, but am in no way upset by making the choice to do so. Color me mildly dismayed when people have a hard time understanding that other people in other places do things in different ways, without any real difference in effort or loss of time as experienced by those other people, and upon hearing that those different traditions make a certain kind of logic and have a real benefit to those other people, become defensive as if they were being told 'your doing it wrong.' Not upset in the least, bemused and mildly dismayed in a slight measure.