In a standard room, the pillowcase openings of both beds should face away from the bathroom. Why?

In a standard room, the pillowcase opening of two beds should be back to the bathroom, because this is not correct. In a standard room of a general hotel, two pillows are placed on a bed, with the opening facing away from the bedside table. When placing a double bed, the openings face each other and lie flat on the bed.

A pillowcase is something that wraps the pillow core under a pillow towel, like a cloth pocket. Pillow case is an important part of modern pillows. Ancient people didn't use pillowcases. They use pillow cores and pillow covers.