Two men, who are in the country for holidays, are walking i

Two men, who are in the country for holidays, are walking in an orchard. They see that there are a lot of apples on all trees. Only on one tree there are no apples at all. A small country boy is sitting near that tree. They call him: “Come here, boy. Do you know why there are no apples on this tree?” “Of course I do,” answers the boy, “because it’s an oak-tree.”