Does this give you permission to stab him repeatedly in the chest? Or at least deny him the next bite of living rabbit liver?
What about when he shows you the bottom of his shoe?
Well for me it used to mean, check if all my buttons are done up.
Tidbit two:
In the desert due to the intense dry heat, everyone covers their faces; the men use the shumag (red and white checked cloth) that they wear on their head. Its impossible to be outside with your face exposed, you feel like you're being cooked slowly.