In other words, attitudes are not absolute, they are culturally ingrained. So who is the one with the problem? The one doing what comes naturally, or the one who, as a result of their cultural conditioning, finds it offensive?

Just a couple of rather basic points here. First, babies need feeding. Second, no-one on this planet has the right to be not offended. The very best way to feed a baby is by breast-feeding. Substitutes just don't measure up. If you see a woman breast-feeding, you are one hundred and ten percent at liberty to not watch. If you watch, then complain, you are a bloody pervert.