I think bra helps keep the original shape of breast. I realized that women who spend their lives without clothes including bra didn't keep their breasts' shape and the breasts were nearly flattened.
In my opinion, what is supporting breats mainly is not muscle but fat.
Diary of a rail fan in Kansai,Japan(Ver.2)
About world's rail news, general news, my train pictures, and travel diary)
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