Just a quick doodle between other things.

I reckon that, as with the Jon and Pinocchio, the Spine has a slightly morbid obsession with the Wizard of Oz and the concept of the tin woodsman. The Tin Man was cursed to chop himself into nothing and be replaced by tin limb by limb, eventually losing his heart and the ability to love with it. The Spine was originally created from metal and has never had a ‘real’ heart to lose, yet he is able to have feelings towards humans.