When I change the sheets, I let the comforter drape over the bottom of the bed on to the floor and makes a nice little tunnel that Azrael always looks forward in crawling in and sleeping for awhile. I never disturb her, I let her say when she is finished with it.
I don't know what it is with these little Yorkies, but I've never had a dog that ever had such a wonderful place in my heart as these two girls.