Lyric discussion by PlutoniumBoss 

Cover art for Cowtown lyrics by They Might Be Giants

I agree with Malkavian. So much (but not all) of TMBG's imagery is just for the sake of wordplay, for the image itself. It doesn't necessarily have to be a metaphor for anything, and any connotation is applied arbitrarily by the listener, like an auditory Rorschach.