What's wrong with exploring oneself? Obviously not too much nor wrongly in public and never to excess, but if the modern spelunking is just urbex - which it is, in my view, and much more appealing than any dank smelly old cave - then, though I won't repeat the hideous portmanteau, I don't suppose I see too much of a problem with this practice, either.

After all - γνῶθι σεαυτόν, wasn't that the phrase? No accident at all we find it incised over the gateway to an oracle. You might want to think about that, who has just finished reading this now.

Mellon is Sindarin for "friend", so maybe mellonking is exploring one's friends?