Americans - as much as I love America - are much more closeminded when it comes to what is called proper attire. Like you have to wear a bra, and a lined/padded one, to be tasteful. God forbid if someone can see you have nipples!
I dont even own a single one and my girls are very happy to be free :)
I am a firm believer that bras are bad for a woma's breast health, compromising the lymphatic flow of the breasts.