I think this song is about a boy who wasted all of his time on a girl that cheated on him the whole time. She broke his heart, and in the end he stopped making excuses for her. "The moral this time is girls make boys cry." There was no reason to "shoot the boy" because it didn't matter that he had gotten with his girlfriend. She had gotten with so many other people as well, it was ultimately her fault.
When he says she's leaving them hanging on the wall I think he has a double meaning. That she seduces boys and leaves them hanging by not calling them, and that she thinks of boys as trophies. She's gotten with a certain number of boys, and it's something to be proud about.
I think this song is about a boy who wasted all of his time on a girl that cheated on him the whole time. She broke his heart, and in the end he stopped making excuses for her. "The moral this time is girls make boys cry." There was no reason to "shoot the boy" because it didn't matter that he had gotten with his girlfriend. She had gotten with so many other people as well, it was ultimately her fault.
When he says she's leaving them hanging on the wall I think he has a double meaning. That she seduces boys and leaves them hanging by not calling them, and that she thinks of boys as trophies. She's gotten with a certain number of boys, and it's something to be proud about.