The word metamorphosis first appeared in 188, because a biological scientist discovered the process of butterfly metamorphosis, which is called "metamorphosis" in history.

So the earliest perverts appeared in the dictionary of biological science.

Later, metamorphosis was widely used. Some people think illogically, have different understandings of things, disagree with everyone's ideas, do things unreliable, have some dangerous ideas and so on. , have been labeled as abnormal.