That makes me think of a little story: Snowy the dog was running for hours and hours and then had to take a dump. Time to get a short break and to get his bearings. And then continue running... south... or north... he couldn't tell the difference. After a few days of running and taking dumps, Snowy got nowhere.
Gosh what a useless ability, he thought. Cursed that primordial bacteria that invented this ability and made us all shit north or south.
(End of little story)
My mother is kind of alternative, telling that the direction you sleep in is important. I never believed it, what difference does it make as long as you are comfortable and warm? But such research would almost make me doubt... what if she is right? Perhaps I should even face my own toiled north-south, maybe that's more relaxed.