Peter, a tourist wondering through the Sinai desert, gets lost and very soon is very tired and desperate for some water.  Then, just when he had given up hope, he sees in the distance a tiny oasis, consisting of a few palm trees.  When he arrives, he sees a sign saying MOSHE’S TIE WAREHOUSE and there, sitting under one of the trees in the shade is Moshe himself.

Moshe is reading the Jerusalem Post.  Next to him is a table displaying dozens of different kinds of patterned coloured ties.  So Peter goes over to Moshe and asks for some water.

Moshe says, "I'm sorry, but I don't have any water.  However, since you're here, would you like to buy a tie?"

Peter is angry.  "What good is a tie to me in my condition?  Can't you see that all I need is some water?  You know where you can stuff your fancy ties."

Moshe says, "It’s no good being rude to me.  If you don’t want a tie, then don’t buy a tie.  Whether you do or not is up to you.  But the fact of the matter is that I still don’t have any water for you."

As Peter begins to walk away, Moshe calls him back and pointing, says, "OK, I'll tell you where you can get some water.  If you walk in that direction for about 30 minutes, you’ll come to a restaurant.  It's owned by my brother Max and there you'll be able to get plenty of food and water.  So Peter starts walking and soon disappears over the sand dunes.  Moshe just continues to read his paper.

Two hours later Peter returns to Moshe’s Tie Warehouse, crawling on his hands and knees.  He is now extremely desperate for water and practically on his last breath.  Moshe asks, "So what happened?  Didn't you find Max’s restaurant?"

"Oh, I found the restaurant alright," gasped Peter, "but Max wouldn't let me in without a tie."