Lyric discussion by Drowningtheoldhag 

Cover art for Kissing Cousins lyrics by Closure In Moscow

I'm pretty sure just before the end of the song, the last time he says "Sing it for all the ills that lead us in" That in the background, in falsetto, he sings "For nativity"

Not sure, but that's what it sounds like to me.

Which leads me to believe this whole song is about humanity, how we cycle and sin and accomplish nothing in the ways of true happiness, we just "Creep all our days". We want whatever we can't have, thus we can "Feast and still feel famine all the same." and we just continue having children and breeding our sinful legacy, "It never ends, we can never rest" Every thinks they're the greatest at everything and better than everyone else, and it's infuriating, thus "Oh it gets me so frustrated, everyone's an expert, I'm so sick of it. It makes me want to gouge a thousand eyes, choke five hundred throats" He's scornful of society and wishes no part of it, thus he sits in his "Castle, disconnected on a sullen throne."