"Two Vacationing Priests" joke

Two priests are vacationing in Hawaii. They don't want to stand out, so they decide to buy casual clothes. They've just hit the beach in loud Hawaiian print T-shirts and sandals when they spot this hot blonde in a tiny bikini walking their way.

As she walks past them, she politely says, "Good afternoon, fathers." Well, the men are amazed, because they can't understand how the woman knew they were priests. They decide to go out and buy even wilder clothes, so they buy tie-died T-shirts, surfer shorts, and dark sunglasses.

The next day, they hit the beach in their wild new clothes, and the same blonde passes them in a string bikini. As she passes,

she says, "How do you do, fathers?"

Well, the two priests are really confused, so they ask the blonde, "Excuse me, ma'am. We're not ashamed of being priests, but how in the world did you know who we were?"

The blonde replies "Why, father, don't you recognize me? I'm Sister Catherine from the convent!"