A guy walking in the desert desperately needed a drink. As he followed the dunes, he came upon another man riding a camel. He asked the man if he had something to drink.
The man on the camel said "No, but if you like, I have a nice selection of ties. Would you like to buy one?"
"No!" The first man replied. "Are you crazy? I need something to drink, not a tie!"
So the man on the camel rode on, and the walking man continued his slow and very thirsty trek for several days. Finally he came upon a cantina.
He gratefully approached the doorman at the cantina and said, "I'm so glad I made it! Can I get in and get some water?"
The doorman frowned at him. "Not without a tie."