I had to go to Wikipedia to figure out what you guys were talking about.
This is some fancy conversating going on in this post.
Fitted sheet on the mattress.
Regular bed sheet.
Blanket.
Pillowcases on the pillows.
I am guessing about 90% of single guys roll this way, and about 50% of married guys.
On a tangent:
Real men can only see these colors: Red, Orange, Green, Blue, Purple, Black, White, Grey, Pin; and then Yellow/Tan/Brown on a precise range between 1SRM to 300SRM.
Women are able to identify all of these additional colors: Chartreuse, Aquamarine, Carmine, Indigo, Seashell, Eggshell, Robin's Egg Blue, Vermillion, Eggplant, Mauve, Ultramarine, Prussian Blue, Crimson, Peach, Salmon, etc.
Its not that men can't see these colors, they just appear sort of greenish blue, or orangish red, or a pinkish purple. See?