Vacationing in Hawaii, two priests decide to wear casual clothes so they won’t be identified as clergy. They buy Hawaiian shirts and sandals, and soon hit the beach. They notice a gorgeous blonde in a tiny bikini. "Good afternoon, Fathers," she says as she strolls by.
The men are stunned. How does she know they’re clergy? Later they buy even wilder attire: surfer shorts, tie-dyed T-shirts, and dark glasses. The next day, they return to the beach. The same fabulous blonde, now wearing a string bikini, passes by, nods politely at them, and says, "Good morning, Fathers."
"Just a minute, young lady," says one of the priests. "We are priests and proud of it, but how in the world did you know?"
"Don’t you recognize me? I’m Sister Kathryn from the convent."