I read once that it had more to do with not seeing wealthy women’s nipples. For example wealthy women would hire a wet nurse to breast feed their babies. It was a way to show off wealth and social standing. So the hired help in the form of a wet nurse could show her breasts, but her wealthy employer would not because its beneath her.

So not showing breasts, even for the purpose of breast feeding became affiliated with wealth and power, whereas the inverse was true, showing breasts meant you could not afford to keep them covered.

And that’s not even including the influence of brothels and prostitution.

Let that cook for however many hundreds of years, mix in religion and you get whatever the fuck we have now.

It was an interesting theory and seemed to make sense to me. I’ll have to try to find the article later. I read it maybe 10 years ago so it might take some looking.