An Indian Navajo sat next to a salesman on a bench in the park. There was a large paper bag between them. The Indian has looked for a while at the bag.

„Do you want to know what’s in the bag ?”, the salesman asked him.

The Indian nodded.

„It’s a bottle of wine. I took it for my wife”, the salesman says.

The Indian was silent for a while, then nodded again several times and said:

„You made a good exchange !”