In Germany women don't shave their armpits or legs. In France both women and men seldom bathe. Italian women are famous for facial hair. In most of Africa both women and men wear nothing but loincloths.
There's a point there, but I don't see it. I have never seen Andrea Merkle sticking her tit in anyone's mouth.
The common denominator in all those places you named is that breast feeding is not a big deal, its not even an after thought but in the US it is, I'm just curious as to why. Hell I have even see Arab women in Kuwait breast feed in public.
That would be the lowest common denominator.