A nice, clean joke

A priest and a Rabbi are very good friends, so they decide to go to a remote lake for a swim.

Of course they're swimming naked as you do. All of a sudden, two busses pull up. Out of one pours the rabbis congregation and out of the other pours the priests congregation. Their clothes are on the other side of the lake so they don't have time to retrieve them, they just have to make a run for it. The priest, running with his hands covering his genitals looks over at the rabbi and sees him running with his hands over his face. He says, "rabbi! What are you doing!" The rabbi says, "in my community, they recognise me by my face."