You know, when I was a little kid, all the kids used to run around under the hose topless in the summer, then one summer I started stripping off down to my undies for a run under the hose and mum told me to go put my togs (bathers/swimmers) on. When I asked why she told me because it's rude for girls not to wear a top over their chest.
I can remember feeling really embarrassed about my nipples and that feeling carried through to puberty when I started growing breasts. I thought that whole area was naughty and bad.
Of course, I still think that, but in a good way.
Seriously though, more women should feel more comfortable about getting their gear off, particularly in places like the beach. In fact, I personally believe all beaches the world over should be clothing optional all the time.