:
Human children are designed (whether you believe by millions of years of evolution, or by God, it doesn't matter) -- to nurse *very* frequently, based on the composition of the milk of the species, the fact that all higher primates (Primates are the zoological Order to which humans belong, higher primates include monkeys and apes) keep their offspring in the mother's arms or on her back for several years, the size of the young child's stomach, the rapidity with which breast milk is digested, the need for an almost constant source of nutrients to grow that huge brain (in humans, especially), and so on. By very frequently, I mean 3-4 times per hour, for a few minutes each time. The way in which some young infants are fed in our culture -- trying to get them to shift to a 3-4 hour schedule, with feedings of 15-20 minutes at a time, goes against our basic physiology. But humans are very adaptable, and some mothers will be able to make sufficient milk with this very infrequent stimulation and draining of the breasts, and some children will be able to adapt to large meals spaced far apart. Unfortunately, some mothers don't make enough milk with this little nursing, and some babies can't adjust, and so are fussy, cry a lot, seem to want to nurse "before it is time" and fail to grow and thrive. Of course, usually the mother's body is blamed -- "You can't make enough milk" -- rather than the culturally-imposed expectation that feeding every 3-4 hours should be sufficient, and the mother begins supplementing with formula, which leads to a steady spiral downward to complete weaning from the breast.
:
Is this convenient for parents? No!
Is this difficult for some new parents to adjust to? Yes!
No doubt about it, the gap between what our culture teaches us to expect of the sleep patterns of a young child (read them a story, tuck them in, turn out the light, and not see them again for 8 hours) and the reality of how children actually sleep if healthy and normal, yawns widely.
But the first steps to dealing with the fact that your young child doesn't sleep through the night, or doesn't want to sleep without you is to realize that:
* (1) Not sleeping through the night until they are 3 or 4 years of age is normal and healthy behavior for human infants.
* (2) Your children are not being difficult or manipulative, they are being normal and healthy, and behaving in ways that are appropriate for our species.
Once you understand these simple truths, it becomes much easier to deal with parenting your child at night. Once you give up the idea that you must have 8 hours of uninterrupted sleep at night, and view these nighttime interactions with your child as precious and fleeting, you get used to them very quickly.
BB has this on CC: 
