One suggestion/theory I'd like to posit about this. There may be a third factor, and that is our "awareness" of what's in our mouth. After I eat food, I can't s

One suggestion/theory I'd like to posit about this. There may be a third factor, and that is our "awareness" of what's in our mouth. After I eat food, I can't stand for any food that is lingering or stuck anywhere on my teeth. It gets picked out with my tongue, water, or something else. It could be that a lot of people that have bad oral "health" are unaware of the amount of food they're letting float around in their mouth because they never became aware or able to "sense" the insides of their mouth.