According to the author of the nonfiction book, Things My Son Needs to Know About the World, what is a baby's life centered around?

According to the author, the first year of a baby's life is centered around poop - smelling poop, cleaning up poop, anticipating poop, and the absence of poop. Poop becomes a popular topic of discussion between himself and other parents, as it is a key indicator of a child's well-being. He goes on to joke that poop is one of the reasons for the advancement of modern technology.