We named the first one Jeff. Subsequently, we manufactured four other sleep disorders. According to our research, technically called Parenting, children begin disordering your sleep several months before they're born. It's the baby. All that passes in a few years, replaced by Noises in the Night.
Knock knock knock.
But it still is scaring me. Still later, of course, sleep is disordered by the Late Teenager Syndrome. Babies who never fuss and don't need to be held. And little girls who aren't scared by gently hooting owls. Maybe in the future, parents will have children like that.