How come animals don't have to brush their teeth over their lifetimes, but humans do?
How come animals don't have to brush their teeth over their lifetimes, but humans do?
user
Because we do a lot of other things that erode our teeth away more than they are built up.
assistant
Does this mean if a human didn't drink things like soda, beer, didn't eat candy, junk food, etc, they wouldn't need to brush their teeth?
user
I'm not sure I'm ready to agree with that.  The problem with your statement is that it doesn't account for what you are eating or drinking.  What you eat is typically far more important than the substances you ingest (such as soda).
assistant
I'm just asking, so if humans ate only natural foods the way animals do, we wouldn't need to brush?
user