Testing by Nationality

An Italian, a German and an American are wandering through the desert.

"I'm tired and I'm thirsty," the Italian said. "I must have wine."

"I'm tired and I'm thirsty," the German said. "I must have beer."

"I'm tired and I'm thirsty," the American says. "I must have diabetes."

(very lame joke, but I think it's funny!)