Fluid isn't usually used to mean over the span of hours, it's a term for anyone who feels like their gender had changed at some time in their life.

Panromantic: Pan is any gender or sex including male, female, trans, intersex (by biology or choice) or any other gender/sex. Bi is specifically only men or women. Not being interested in sex as a sexual identity is not the same as having a low libido. It's not that they want it but not too often, it's that they don't want it. That's not to say that there can't ever be exceptions, but there are always exceptions to labels like these.

If someone has formed their own society with its own quirks because they feel so uncomfortable in general society, is there something wrong with that? That's how many cultures form (oh hey modern america). I find it strange that it often involves fur suits, but I find it strange that Cornish people have a tradition of dancing around in face paint hitting sticks together.

If you would rather they stay a part of general society then maybe accepting some weirdness and talking to them as if they are human beings with all the same issues as anyone else is a good thing. That's what I took from the article anyway.