New mothers often wonder why babies cry so much, and can't sleep for long stretches without requiring their parents' input. I don't wonder anymore. I know why. Babies require regular input because mothers must not be allowed to sleep for long periods of time. Certainly they must never be allowed to sleep and sleep until they have enough and are fully rested. And this is why: If a mother allowed her body to sleep until it woke up of its own accord, she would starve to death.
~Killing a Fly with a Ukulele is Probably the Wrong Thing to Do