I think this is about someone who's become so guarded do to past relationship hardships that they have locked a part of themselves away that no one can get to, so that they feel they can't be hurt again - a way for them to safeguard that part of themselves from possible interference.
I think this is about someone who's become so guarded do to past relationship hardships that they have locked a part of themselves away that no one can get to, so that they feel they can't be hurt again - a way for them to safeguard that part of themselves from possible interference.