Most Helpful Guy
Hard call on this one. Trying to picture it and it sounds to me like it would be very appropriate for public exposure. Your thoughts of appropriateness are primary and it sounds like you are fine with it. But also is the acceptance of where you put it. I think FB would be against it for the exposed breasts, but as art it might be okay with them. And are you okay with people you see daily seeing your breasts?
Personally I think the picture sounds great and that putting it out where others can see it is a good thing. I would have no problems with my SO doing that. Again, it mostly depends on your personal feelings about it. If you decide to do that, please message me a link because I am interested in seeing the final result.