Why do pigs laugh?

One day, there was a flood in the forest and the animals fled by boat.

But it is helpless and overloaded, and some animals must be sacrificed.

Everyone decided to tell jokes.

Afraid of being thrown, the sheep told a joke at first.

After the speech, everyone felt funny, and the sheep relaxed and thought they were all right.

But everyone found that the pig didn't laugh and was thrown down in frustration.

Then the cow told a joke, and no one laughed. Only pigs laugh wildly.

Everyone asked the pig, "The jokes of pig and cow are not funny at all. What are you laughing at? "

The pig grinned and said, "The sheep's joke is really funny! ! "