Most people reach for a pillow without giving it much thought. It is considered an essential part of a comfortable night's sleep. Hotels advertise luxurious pillows, and sleep experts often discuss pillow height and support. Yet some people deliberately sleep without one. Even when offered a soft pillow, they push it aside and rest their head directly on the mattress.
Friends and family often find this surprising. Some assume it must be uncomfortable, while others wonder whether it reflects a particular personality. Psychology suggests there is no evidence that sleeping without a pillow reveals a fixed personality trait.
