Have you ever seen someone holding a baby and think “Uh oh! Please support that baby’s head!”? Do you say something?
Well, I sure do! It's a bit different than hemming and hawing over whether you tell someone she has a run in her stocking! There is definitely an important foundation behind the "support the baby's head" belief.
Newborn babies have large heads in proportion to the rest of their body. This coupled with neck muscles that are not yet strong enough to support the head; means the head must always be supported.
So, how does one properly hold a baby?