Why are infants supposed to wear a hat all the time?

Actually there is no rule that says that they 'must' wear a hat all the time. It depends on the weather and also the condition in which the baby was born (some hospitals insist that your baby wear one for a few days). But here's why you can avoid it: - Baby's body has a natural scent and oxytocin releases that scent and if you make him wear a hat, you cover it up. This study proved that the delightful smell further helps you bond with the baby. Ref link: http://journal.frontiersin.org/article/10.3389/fpsyg.2013.00597/abstract - Skin-to-skin contact with the baby helps to regulate his body temperature. You can read this study that proved the same. Ref link: http://www.ncbi.nlm.nih.gov/pubmed/26277824