Bed Sheet "Dispenser"

I got this idea while at a public bathroom. They had one of those towel devices to dry your hands. You know the ones - they are actually one long towel that only allows you to access a loop at a time. Well - why couldn't you supersize the device as a replacement for your bedsheets! You would actually need 2 - one device attaches at the head and foot of the bed with the sheet in-between - this is the bottom sheet. The top sheet is like the towel dispenser - it stays at the foot of the bed and you lay under a "loop" of the fabric. Whenever the sheets get skuzzy - you just unroll a new section. When the rolls are done, you bring them into a special cleaning service - they clean them really cheaply since they just run the whole roll through a cleaning machine, like film through a projector!