A vain lion wanted to find out why the other animals were not as beautiful as he.
First, he asked a giraffe. The giraffe did not know.
Next, the lion asked a bear. The bear had no answer.
Then the lion asked a hippopotamus, and again got no answer.
Finally, the lion met a mouse. He asked the mouse, “Tell me, why aren’t you as big, as strong, and as beautiful as I am?”
The mouse looked up at the lion and said, “Well, I’ve been sick. “
This joke is included in the Black Book of Jokes. You can order it from here.