They're not...

KBA, they're obviously not strictly sexual, that's why you see barechested females of all ages on naturist websites or in National Geographic and stuff like that. The thing is: this forum often focuses on sexual topics (and yeah, even if you think romance is more important, they're too closely linked to treat them as discrete topics). So basically, the board itself sexualizes them, and then the images cease to be informative and begin to be gaudy in nature. That might be appropriate for some kind of appreciation site, but it's not for a forum where the focuse is supposed to be upon conversations. You say you don't see the point in covering up. You need to focus more on biology KBA: bodily fluids come out of nipples. It makes sense to cover up orifices which expel fluids. Honestly I find it abhorrent that we don't cover our mouths as a culture (I got some respect for the Burqa if males would also wear it) but I understand people have a need for breathing and smell and facial expression, but you don't get any of that from going barebreasted. I don't necessarily get offended, if I do it's more because of people's disregard for order or my own personal health or sense of aesthetics.