I shave with my right and stretch with my left.
Right hand holds the razor, left hand stretches the skin.
I shave with my right hand and never realized it until after reading this but I lean against the sink to get closer to the mirror and put my left hand behind my back when I have the razor in my hand. Maybe I'm afraid of shaving a knuckle ? And I will also admit to sticking my tongue out when I shave as well. Let the mocking begin.