Lyric discussion by orphaeus99 

Cover art for Stiffback lyrics by Fair to Midland

I agree with Cod for the most part, but the lyrics "Mrs. Unknown what is upstairs? Steps but no banister" refers to war insanity suffered by military wives (and war veterans alike). Basically, "upstairs" is a common allusion to the mind, and steps but no banister means that there's a lot there, but no borders, which could mean insanity.