to sweetestsiren-
what the line " ... tear down your defenses til there's nothing there but me ..." to me, means that the girl he's talking to in the song puts up false defenses around her by isolating herself from others, not letting them into her heart, so that she doesn't get hurt. he wants her to let go of her fears and realize that he's standing there, ready to be the right kind of shield from pain for her.
to sweetestsiren- what the line " ... tear down your defenses til there's nothing there but me ..." to me, means that the girl he's talking to in the song puts up false defenses around her by isolating herself from others, not letting them into her heart, so that she doesn't get hurt. he wants her to let go of her fears and realize that he's standing there, ready to be the right kind of shield from pain for her.