Most people are prepared for the first couple of sleepless weeks with a baby; maybe your family is around, or at least you aren’t working off a base of exhaustion. But then month 2 comes, and still the baby is sleeping only two hours at a stretch. At some point, the pediatrician tells you, “A baby of this size can sleep for up to six hours at a time.” You want to poke them in the eye with a pen.