Another odd thing about public indecency and breast is that in 45 states breast feeding in public is 100% legal!
A woman is pulling out her bare breast, in public and its legal!!!
I also think it's pretty obvious that babies should not be regarded as clothing. If a breast is exposed enough for a public nudity or indecent exposure charge, the presence of nursing baby should not make a difference. This should be obvious to anyone with a pulse.
I was joking at first when I asked if you where sexist, but as a male this is starting to sound sexist.
A sexist is a person that regards sexual differences as real, important, and worthy of some recognition by society. A non-sexist is someone that believes sexual differences are no more significant than skin color. Not being entirely divorced from reality, I am proud to call myself a sexist, which is to say a realist. There is no need for sexism in the matter of flashing your under-wear clad undercarriage, though. It should be illegal for both sexes. Of course, I said that already.