The “U”-shaped travel pillows provide support to the head and neck while sleeping in an upright position.
Sleeping on your back and having pillows under the knees can help alleviate back pain.
Due to the difficulty of sewing and dyeing, pillow making was a haloed art and pillows were prized commodities, in China and Medieval Europe.
It is only a coincidence that Reese Witherspoon was really pregnant when she played an expecting Becky Sharp in Vanity Fair. Otherwise pillows are used to simulate reel pregnancies.