The only things certain in life are death and taxes.
Oh … and the fact that children are born selfish.
Straight from the womb, kids have no boundaries. They don’t care if their mom and dad are hungry, overworked, or haven’t slept in days. They’ll scream for food when they’re hungry and for a new diaper when the old one has, let’s say, fulfilled its purpose.
Fortunately, there’s nothing in that behavior for parents to worry about because that’s the means God has given infants to have their needs met and to survive.