With my wife's pregnancy she's been having a little bit of back pain at night and bought what's called a snoogle to help her stay on her side. Here's what they look like:
Last night I came to bed at around 11:00. As I was getting ready for bed, my wife was engaged in a full-on struggle trying to free herself from the snoogle. She had the pillow against her back like the top picture and had to work a bit to free herself so she could use the bathroom. She came back to bed and said that when she woke up, she couldn't figure out why she was stuck in the middle of a letter c.