Do you know about day/night confusion? Because when the baby’s in the womb, it’s most active at night, when the mother’s sleeping. So, during the day, when the mother is walking around and doing stuff, the baby sleeps due to the calming nature of being swayed around for hours. But then, come nighttime, and the mother goes to sleep, it’s baby’s party time. Thus, when the baby comes out, for the first several days they’re on the literal opposite schedule they’re supposed to be for life. It’s just another thing that makes babies seem like Nature’s Murder Weapon.