...Ah! So you wish to hear a joke of mine? Very well. I... I can think of something!

[He pauses for a moment as he tries to process a joke. He has to prove that he can be funny!]

Alright, here is a similarly-themed one. Why did the caterpillar go to sleep for ten to fourteen days? Because it really needed its beauty rest! Also known as metamorphosis, the process by which it becomes a butterfly! Butterflies are associated with being pretty, so that would be the general theme of this joke! So, what do you think?