As the Middle East boils and rages, and as American foreign policy makers zigzag every Monday and Thursday, The Jewish Theater of New York is extremely happy to offer a little advice to the perplexed. Welcome to Tunisia, land of hotel servants turned revolution makers, and be greeted by Saida, Tunisia's most beautiful lady, who is heavily courted by two visiting guests: One Jew, one Arab. Saida, you must know, is in a little predicament these days. Before the week is over she must decide which of the two men will father her children -- and she cannot zigzag. Which man would you advise her to marry, the Arab or the Jew? Come on in to offer your five cents. But do pay attention to this: Both men are Secret Service agents, and so it's up to you to find out if what they say is true, how much of it, or if any.