Two nuns are ordered to paint a room in their convent. The Mother Superior's final instruction is that they must not get a single drop of paint on their habits.
After discussing the matter, the two nuns decide to lock the door, remove their habits, and paint in the nude.
In the middle of their work, there is a knock at the door. "Who is it?" calls one of the nuns.
"Blind man," replies a voice from outside. The nuns look at each other, shrug, and decide that letting a blind man in can do no harm. They open the door.
"Nice boobs," says the man. "Now, where would you like me to install these blinds?"