This is a strange new product.
Pillows that include a false arm that gently cuddles the sleeper in bed are the latest fad in Japan.
The Boyfriend's Arm Pillow consists of a headless torso and a stuffed arm that curls around the sleeper.
It's been out for a while but for some reason has been mentioned in several news stories lately. They say it is comforting, but I can see where it could freak you out the first few times you woke up with it.