Explain that I can't understand this English joke (don't use translation).

Can you imagine that the word "he" appears five times in a sentence, and there are no other words in the middle? There is a sentence at the end of this story. It is said that there used to be an inn called "chariots and horses". Outside the inn stood a plaque with a horse and a carriage painted on it. But this card is getting old, so the innkeeper decided to make a new one. The boss asked an artist to draw a horse and a carriage and wrote the word "carriage". A few days later, he went to see the progress of the painter. The boss is satisfied with the paintings of horses and chariots, but he doesn't like those words at all. . He said to the painter, "No, you can't! The distance between the horse and the car is too big!