Just watched Lawrence of Arabia. As he is crossing the dessert on his way to Accaba(?) he gets in a quick strop and shave. "That's a waste of water" says Omar Sharif's character...oh how wrong he was! Dying of thirst, or a nice straight shave? Lawrence was a man who knew his priorities!
Later in the film, as he is reporting back to headquarters he also mentions " I better have a shave.."