The Tzaddikim used to always keep their hands above their waists. I can understand how this was done when all you wore was a robe and sandals, but how did men like the Chofetz Chaim do it when they wore pants? How'd they get dressed and go to the bathroom?
Edit: The Gemara says the Rebbe's hands never went below his waist and the Rambam says that it's a righteous thing to do. When you look at pictures and videos of the Chofetz Chaim, his hands are never below his waist.