#elaborated upon

[wrenn-frug]

Beds can be used as protection circles, and are generally considered ones by children.

They protect from monsters and bad energy

you generally have comfort items in them to boost your energy (spell components)

bring someone else into your protection circle for mutual comfort and safety

if you break the circle its more likely the unwanted things can get to you (e.g. monsters, bad thoughts, nightmares, etc)

even if its not actually making your bed most people have a ritual for when they do get into bed