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?
My titties hurt when they bounce too much during hormone shifts. Plus the nipples are really irritating in A/C when they stiffen and feel wormy (dunno how to describe, like a small boner demanding attention) and I also accidentally scratch them without a bra to cover them. Was especially important to have some sort of coverage when I had piercings in them because I almost tore one out brushing my hair. Never healed right after that.