"Elves?! That- for god's sake, I suppose that's one of those nonfiction things, too... but as for speculation, it'd mean... the bosses, the door, the whoever... they prefer... it's an obvious anchor, they're human and prefer doing... whatever it is they're doing, to other humans, or people close enough to humans."

There's that manipulation at play again. Silicon-based hive-mind aliens with inhuman psychologies, less likely to be manipulated in the usual ways. Bring in people you can understand, who you can control...

But that comes back around the the same question- he mutters it under his breath- "why?" Why the bar, why the door, with the power to open doors to anywhere... what could they be after that they couldn't take for themselves?