How Come?

I took the morning off To plan a weekend on Some distant day alone, Did you still wanna go? The train was hovering, A steel leviathan Our walls were paper thin You turned to me and said, How come At our best we're still wrong? And the second you called Had me thinking, how come Getting lost in someone You don't see when they're gone? When I tried answering The mighty stranger left, Reminded us of them They're so indifferent How come At our best we're still wrong? Who's the one to outrun? Caught me thinking, how come Getting lost in someone You don't see when they're gone? And the second you called Had me thinking, how come?