Generally they use a top sheet, although there are people who use only the duvet or perhaps a blanket. I think the principle of this device, however, is to cover up everything with the duvet.
That said, I can hardly wait until they’re commercially available. Although I’m not sure something with mechanical arms would be much of a fashion accent for my room...
Sounds pretty hideous doesn’t it? What if someone accidentally pushed the button/Obama thingamajigee in the middle of the night?
I’m one of those on the side of bedmakers. I won’t leave the house until the bed is made.