It may be something like that, yes. I... really don't know, to be honest; perhaps I'll ask one of them when I next see them. And... neither would I, really. I suppose it could be more ridiculous...

It exists in some worlds-like mine, for instance-even if it doesn't exist in yours. I can't blame people who are skeptical, of course, given that even in my world great lengths are taken to keep it a secret.