Saw this to late, but since it is an issue for me as a (male) artist, I would like to add a word or two.. or more ;-)
Where I live (in Germany) its no big deal at all, for a woman to show her nipples. They go swimming topless and wearing nothing under a T-shirt for instance is so common, that one hardly pays attention to it. I always had to laugh, when friends from the US were watching commercials here all the time, for a chance to see the forbidden fruit...
A good part of my art displays (female) nudity and so I've had big problems getting banned on fb for showing my work. A lot of my colleagues too... ok, we found one solution and I think it shows part of the absurdity of it all.
Not saying, I don't find a girls nipples exciting... but like @steemed-open already said so well, that's the nature of our being. Why should women walk around under a tent because of that? IMHO in a civilized society, its the responsibility of the men to keep their hormones under control...
I love that male nipple thing haha! I suppose I do remember living in Europe (Spain) where things were free-er, but Spain still had some issues with nipples and catcalling and such, despite the beaches being top optional for all. Every time I hear a man speak up about this, it feels a little better, and knowing in Germany nipples showing is just fine, that's great. I'll be in Munich in a couple weeks (briefly, though I'll mostly be in Austria), so maybe I'll exercise this.