 whether we're in the Bacterioides type, which naturally likes to eat more meat, or whether we're in the Firmiculitis type, which is sort of a natural vegetarian, and so on, right? That's fascinating. You use the word intuitive eating a lot in your book, when I was going through your book. Do we intuitively know what is good for us, or is that why you wrote the book and put it on the right path?