"Not from around here?" She filled in, shrugging a moment later, "Most people have them, at least where I'm from, it's just that nobody can really see them. And there's a lot more of them at home than there are here." She shrugged, "So I'm not sure how that happened. Now, I know I said they were parasites, but how that works is that people generate a whole lot of stuff that we don't use, it just sort of follows us around, heat being the most obvious, but there's also electrical and emotional impulses that don't actually go anywhere, they just collect. That's what these guys eat."