I have read somewhere in this forum that in Europe it is customary for beds to have a fitted bottom sheet topped with a comforter with a duvet cover which is laundered between guests. Here on ol' Cape Cod I make my beds with a fitted bottom sheet, top sheet and coverlet, with blankets in the closets. In the winter and shoulder seasons I have a heavier comforter folded at the foot of the bed. I am finding with frustrating frequency that my guest don't bother to get "between the sheets", opting instead to sleep on top of the sheets- sometimes on top of the coverlet with the heavier comforter over. (Soon I'll be stowing the comforters for the high season, which may help somewhat.) What's up with that?? I am tempted to create a universal sign with stick figures pulling back the sheets and posting it by the beds... Any advice/observations?