the.com/body pillow

A six-foot hug you never have to text back.

means A long cushion sized to the human body, hugged, straddled, or tucked against for support while sleeping.

from A straightforward compound of 'body' and 'pillow' — no hidden etymology here. 'Pillow' itself traces back through Old English 'pyle' to Latin 'pulvinus,' a cushion. The body pillow as a named object is a modern (20th-century) development, popularized especially through pregnancy support pillows and later through Japanese 'dakimakura' hugging pillows, which pushed the shape into pop culture.

origin
Japan popularized them as dakimakura, anime included
pregnancy use
doctors actually recommend them for hip alignment
peak demand
sales spike every breakup season, aka winter
the.com · every word