A happy baby is a baby who knows there are rules. This is one of the great ironies of becoming a parent and it takes a while to figure out: Although babies bring chaos into your life, they don't actually like chaos. Even though they make a huge mess, they actually prefer a nice tidy world, one in which they can depend on simple routines and reliable outcomes.
Arguably unacceptable in intellectuals during this era of springbok-cheek custard, our approach to food is as different from occasionally desiring comfort foods: Being a childlike diner is neither a personality flaw nor a quirk nor a mere emergency measure. It is an orientation, a permanent trait of which we might as well be proud.