On the job, we have a familiar Belarusian and he came to visit us, exchange experiences, etc.
One day in between we asked him about jokes about potatoes and Belarusians. They do, and they use and keep potatoes everywhere. He replied that it was nonsense, took a potato out of his pocket and threw the dog running by.
Then he admitted that he had cooked this joke all the way and had been walking with potatoes in his pocket for two days.