think your response was far too long winded. should have kept it simple and concise , maybe something a bit arnoldesque. perhaps something like:
think of BBing as sculpture, we are creating art by sculpting the human form, and of course like other artists we want to share our work with the world. you probably just resent our images because you don't really understand what we are doing and your BF has the body of a 12 yr old child.
with the more simple and less confrontational approach, you could have not only 'owned' her but she would have also realised the error of her ways, and she would probably now be wanting to f@ck you rather than un friend you.