I gotta ask this: why are you trying to apply science to a fantasy game?
Last time people try to say "guys, it's just a
game!", gamers cried at how unrealistic things are. Even going so far as discussing how a looking-good armor is vastly inferior to "unisix" armor, completely ignoring the fact that you can't break your bones in this game (and you have inter-dimensional inventory bag)
It's not easy being green...
If you want a real mind twister- try explaining http://www.uesp.net/wiki/Lore:Khajiit#Morphology.
The Khajiiti are crazy bunch with superstitions that actually works

I heard Koreans name their children with a standardized naming convention based on when they're born, so perhaps you can try asking a Korean, they may have a more related answer. I don't know what Kim Jong-Il means though
Orcs are either green or gray. Nobody buys an orc with human skin or anything other than gray/green. See Shrek for reference. Bethesda can call cat-fetishists' wetdream Khajiiti, but even they need a just reason to call something "Orc"