A nun, badly in need of a toilet, ventured into a pub to seek relief.
The place was hopping with music and loud conversation and every once in a while the lights would turn off, then the place erupted into cheers. However, when the revellers saw the nun, the place went dead silent.
Going up to bar, she asked if she use their facilities. The Landlord said, "Okay, yes, but I should warn you that there is a statue of a naked man in there wearing only a fig leaf."
"Well, in that case I'll just look the other way," said the nun, before going to the toilet.
After a few minutes, she came back out and the whole place stopped just long enough to give the nun a loud round of applause.
Going to the landlord, she said, "Thank you, but I don't understand why everyone applauded me for, just because I went to the toilet."
"Well, now they know you're one of us," he replied. "Would you like a drink?"
"But I still don't understand," said the puzzled nun.
"You see," he laughed, "every time someone lifts the fig leaf on that statue, the lights go out."