Dogs eat human excrements, but they are totally clean animals. No parasites whatsoever. It is totally safe to keep them in your house and even lick their mouths!
Where the hell did you get that idea? We had to deworm the farm dogs all the time growing up. My cousin got tapeworm from a dog's fleas once. Animals that live or work outside will have exposure to parasites, cleanliness is only a partial protection. No animals are totally immune as far as I know.
Sounds good to me, how about we both exercise our immune systems - I'll give you as much time as you need then we'll both step on some rusty nails. I'll be taking the vaccine. Don't worry though, since you've been robustly hitting the immune system treadmill I'm sure you'll be safe from the ravages of tetanus.
>You must exercise your immune system to get used to it.
The immune system is not a muscle and does not benefit from "exercise" in such a simple fashion. Inoculation is a careful process and does not "exercise" your immune system but rather reliably introduces a new identifiable threat to your immune system's memory. You can inoculate against a million different things and your immune system will be not significantly better equipped to handle a novel infectious agent.
Similarly, you could french kiss every single toddler during flu season and be no better off with a novel pathogen.
You cannot "exercise" the immune system. You can only train it to recognize specific targets.
The Hygiene Hypothesis, the closest thing to a speck of truth that this absurd notion might have come from, is about allergies and tuning the response of your immune system to common foreign bodies.
If the hygiene hypothesis is confirmed or well supported, growing up in a clean room would make your immune system over-active and over-destructive, NOT WEAK.
This stupid concept has grown so much since COVID and it's infuriating. The hygiene hypothesis is super important and is linked to research in human microbiomes and is essential for us to understand so that future generations aren't allergy-ridden hulks, but they would still fight off the flu just the same.
People will believe any bullshit just so they can continue to think getting a damn vaccine was somehow not the right move!
If you want a healthy immune system, then eat well, sleep plenty, get your fluids, and get vaccinated!. If you die from a preventable, communicable illness, your immune system won't be able to protect you from decomposing
dogs get worms all the time unless you keep them on dewormer. these days the issue is more eating droppings from rabbits and squirrels and other wild vermin but absolutely happens.
In the US? Not many. We also don't eat horse, cat, and in general don't eat elk, deer, squirrel, possum, racoon, or boar; but some people do. Most people in the US don't eat things you can't buy at supermarkets.
Dogs eat human excrements, but they are totally clean animals. No parasites whatsoever. It is totally safe to keep them in your house and even lick their mouths!