Do we really need bras? Personally I don't think so. Since I retired last year I haven't worn one. Many people of both sexes will immediately say - how disgusting. But I've always hated wearing one and before I retired it used to be virtually the first thing I took off when I got home in the evening.
I think bras were invented in the early 20th century and prior to that women didn't wear them though they did wear various forms of corsets and many layers in most eras. So why do we wear them now? Some people say your breasts will sag if you don't wear one - which turns out to be rubbish. Breasts aren't muscles and all you can do is exercise the underlying muscles which might make a bit of difference, but really as you get older they will gradually drift towards your feet as the breast tissue becomes less dense. I've just finished reading a book about a woman in America battling breast cancer and when she was told during her radiotherapy treatment not to wear a bra as it would irritate her skin - she disobeyed the instruction. She could not possibly be seen outside the house without a bra. That to me is stupid.
I think it's about time we started a campaign for the natural look - no bra. If they sag, they sag. People need to get used to it. Women do not develop with rigid ice cream cones attached to their chests. If you do a lot of sport I can see a reason for wearing a bra which will support you - for the same reasons men wear jock straps. But this is a practical reason for wearing a supporting garment while performing a particular activity. Ordinary every day life - why wear one? You won't have back ache, red marks on your shoulders, or chafing under your breasts if you give it up. People don't like it? So what? That's their problem.