I've seen pictures of bedrooms with those round pillows on top of the bed. When my wife picked up some new bedroom linens, the set apparently came with those round pillows. Every night before I go to bed, I toss them on the floor. If I'm up last, and make the bed, I toss them back on the bed. Seems like a waste of time.
Walked into my bedroom a few minutes ago. Chip knows what they are for: