Let me preface this by saying I am a man, and smoked a little too much, so I'm sitting here thinking... what is or was the original purpose of a bra? Weight support? Vanity? Covering the nips so people's eyes met your eyes and you can have a normal conversation? Like what's it all about?
I'm a 36G and wear the bra because it's super annoying to have them sway when I walk. That's the main reason for me. I find it more comfortable to be braless, but I really shouldn't do it in public. It's attracts more attention than I usually want.
I still don't go braless even in winter because they hang low, and that embarrasses me. Existing at all embarrasses me, so take that with a grain of salt.
Existing is agony, but I just can't care anymore what people think about my tits. I'm the one who has to wear them, and bras hurt (well, I'm autistic and they hit a lot of my brain hurting points) so screw it, I'm going to the wawa in a winter coat and no cares.
It caused more paint when I was wearing ill fitting bras in both size and shape.
I found r/abrathatfits in my mid-twenties and it changed everything for me.
I mostly wear unlined mid coverage demi bra shapes now.
I do still get back pain like just below the shoulder blades in the center of my back. But that's been there for years and I'm used to it now