

Human: How come animals don't have to brush their teeth over their lifetimes, but humans do?

Assistant: Because we do a lot of other things that erode our teeth away more than they are built up.


Human: How come animals don't have to brush their teeth over their lifetimes, but humans do?

Assistant: I'm afraid I don't really know! What's your best guess?
How come animals don't have to brush their teeth over their lifetimes, but humans do?
Because we do a lot of other things that erode our teeth away more than they are built up.
I'm afraid I don't really know! What's your best guess?