Painting job

Two nuns are ordered to paint a room in the convent, and the last
instruction of the Mother Superior is that they must not get even one
drop of paint on their habits.. After conferring about this for
awhile, 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 comes 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, and deciding that no harm
can come from letting a blind man into the room, they open the door.
"Nice tits.. sister" says the man, "Where do you want the blinds?"