Three guys were applying for the priesthood. The Cardinal was going to give them a test. He tied a bell attached to a string on each of their penises. He told them that he was going to show them pictures of naked girls and if the bells rang then they would flunk the priesthood test.

He showed the first guy the pictures and nothing happened. you passed, the Cardinal said.

He showed the naked girls to the second guy. Nothing happened. you passed.

He showed the pictures to the third guy. Nothing happened.

The Cardinal said all of you passed. The Cardinal turned to put away the pictures but dropped them. He bent over to pick them up and all three bells went ding, ding,ding.