After conferring about this, the two nuns decide to lock the door of the room, strip off their habits, and paint naked.
In the middle of the project, there’s a knock at the door.
“Who is it?” calls one of the nuns.
“Blind man,” replies a voice from the other side of the door.
The two nuns look at each other and shrug, both deciding that no harm can come from letting a blind man into the room. They open the door and the man enters.
“Nice boobs,” says the man. “Where do you want the blinds?”