I must know. Do you behave oddly if your head's not pointing North? Do you wake up permanently magnetised with metal stuff stuck to your head? No tent-pole jokes, please...
I have to sleep in alignment with the Great Jedi Temple on Coruscant. It's damn inconvenient because the position of galaxies keeps changing, and would be much easier if my house was mounted on a turntable.
Feet facing south at home - feet facing tailgate when in the van - south being preferable ie Head facing North
Its rude to point , but i do feel uneasy if im facing the wrong direction, i think its the inner compass in you . And if you have metal stuff stuck in your head , maybe you need to remember to take your curlers out or give it a brush after youve been driling/ grinding under your van : I hope this might help, good luck with the shrink O0