I agree with brett and Rock. I would also like to incorporate thoughtatwork's interpretation, as well. It does seem like the song is divided in two halves, based on two people's own interpretations of the same situation (a relationship, etc.). The chorus, with its ambiguity of "shells" only plays further upon how two people can have completely opposite/different interpretations of the same situation (especially a mutual situation like a relationship).
I agree with brett and Rock. I would also like to incorporate thoughtatwork's interpretation, as well. It does seem like the song is divided in two halves, based on two people's own interpretations of the same situation (a relationship, etc.). The chorus, with its ambiguity of "shells" only plays further upon how two people can have completely opposite/different interpretations of the same situation (especially a mutual situation like a relationship).