Here is another funny "Ask A Ninja" video from the same guy who brought you the "Santa Clause Is A Ninja" video. In this video the question is something like "Where do you buy your ninja gear? Is there a Ninja Mart?". The ninja guy explains that ninja suits are the only true black material in the world as all other black dyes are really just dark dark red or green. The true black comes from the heart of a dragon according to the ninja giving the interview. Additionally, all ninjas make their own gear because otherwise they wouldn't be able to trust it. If another ninja made their gear it might be poisoned or some such. One thing he does note is that the ninjas don't make their own wings (for some reason there is a 4000 year contract with someone who makes the wings). It goes on and on like this for some time.