The Mother Superior tells two novitiate nuns that they have to paint their room without getting any paint on their clothes. So the one says to the other, "Hey, let's take all our clothes off, fold them up, and lock the door."
They do this, and begin painting their room. Soon they hear a knock at the door. They ask, "Who's there?"
"Blind man!" comes the reply. The novitiates look at each other, then one whispers, "He's blind, he can't see. What could it hurt to let him in?"
So they unlock the door. The blind man walks in and says, "Hey, very nice bods! Where do you want me to hang the blinds?"