Blind man.
Two nuns are ordered to paint a room in the convent, but the Mother Superior instructs them not to get a drop of paint on their habits.
The two nuns decide to lock the door of the room, strip off their habits, and paint in the nude. 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 other side of the door.
The two nuns look at each other, shrug, and decide that no harm can come from letting a blind man into the room. They open the door.
"Nice boobs," says the man,"
....where do you want the blinds?"