Yeah, many of the comments talk about bacteria, evolution, our immune systems being able to deal with bacteria, and that is all fine and good.
But what about chemicals and cleaning supplies? Eg the floors in a restaurant (and tables, too) get cleaned with some strong chemical products. That's definitely not food grade and no amount of evolving is going to help you deal with that. I see people put their forks, etc, on directly on table surfaces that were previously wiped with a cleaning cloth and I think that's careless. The floor would be even worse.
Eating from your dog is fine and probably has health benefits. Eating from a (chemically cleaned) floor is still not.
But what about chemicals and cleaning supplies? Eg the floors in a restaurant (and tables, too) get cleaned with some strong chemical products. That's definitely not food grade and no amount of evolving is going to help you deal with that. I see people put their forks, etc, on directly on table surfaces that were previously wiped with a cleaning cloth and I think that's careless. The floor would be even worse.
Eating from your dog is fine and probably has health benefits. Eating from a (chemically cleaned) floor is still not.