Twelve monks were about to be ordained.
The final test was for them to line up naked, in a garden while a nude model danced before them.
Each monk had a small bell attached to his privates, and they were told that anyone whose bell rang would not be ordained because he had not reached a state of spiritual purity.
The model danced before the first monk candidate, with no reaction.
She proceeded down the line with the same response until she got to the final monk.
As she danced, his bell rang so loudly it fell off and clattered to the ground.
Embarrassed, he bent down to pick up the bell, and eleven other bells began to ring as he felt a sharp pain in his ass.