1. Ninjas are mammals.
  2. Ninjas fight ALL the time.
  3. The purpose of the ninja is to flip out and kill people.

Ninja were Japanese people trained in assassination, espionage, and a variety of martial arts. They have developed a prominent place in Japanese and American popular culture, and are generally agreed to be seriously cool. To quote the website Real Ultimate Power, "These guys are cool; and by cool, I mean totally sweet."

For some time on the Internet, the idea of pirates being the natural rivals of ninjas has circulated.

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