Babies expect touch and physical closeness with caregivers. In fact, it is vital for their health and well-being. Hence they are upset when adults put them down or leave them alone. It doesn't feel right and it's not good for them.
Ever since humans came into existence babies have been carried, held, cuddled and kept close. All over the world and through time. Even at night.
At night--what?! You mean bed sharing? But isn't that bad? Aren't researchers showing how bad bed sharing is for babies? They could die of Sudden Infant Death Syndrome, couldn't they? Isn't it bad to bed share?
Wrong. You'll have to educate yourself about bed sharing with infants as the reports and some research is misleading. Here are safe guidelines for bed sharing and co-sleeping with infants.
There is a lot of hype from researchers who present only part of the data such as this recent study.
Here is an excellent analysis of what the bottom line is on bedsharing from UNICEF, in light of the recent article.