2 Nuns and a Blind Man

A long time ago, there was two nun, who just join in a new monastery.
The administrator of the monastery summoned the two nuns. She asked them to start work
immediately, and they were given the task to paint and old room, where they are going to be house permanently.
So, with two pail of paints and brushes, they were directed to the room and started their painting work.
As the paint along, the roller paint drips some paint onto their robes. The paint on the robes is difficult to be washed away. So, one of the nun suggested, since they are in the room and and they could lock up the door, why don't take out the robes and then paint nakedly. Hence, both of them took out their robes and underwears and started painting nakedly.

Suddenly, there was a loud knock on the door. "Who's there?" asked one of the nuns. "I am a blind man." Both of the nun, talked for a while, and were considering whether to open the door or not. As it is cumbersome, to put on the robe again, and then open the door. "Since he is blind, he could not see, why not let him in." said the other nun. After few deliberations, they decided to let the blind man in. The man came in and said to the nun " What beautiful bodies both of you got there, dear sister" He then went straight to the window and set his work to install the blind onto the window.