Large breasts are heavy. Redistributing the weight helps the back.

Also for some people seeing nipples is scary for some reason.

I have 38C and I wear a bra for a variety of reasons. It does help with support, they weigh a lot and having them bounce freely hurts. It's like having two large water balloons taped to your chest. Every slight bump or jolt pulls on the skin.

It also helps with sweating. Underwood sweat is a real thing and just as uncomfortable as armpit sweat or thigh rub sweat. A bra helps to absorb sweat and moisture under there.

A bra also acts a a sort of "armor." My breast's are rather sensitive, and rubbing against my shirt or other stuff can be painful. Having a bra layer protects them from chaffing and rubbing.

There's also a bit of vanity to it, depending on type and style of bra. Some are utilitarian and functional only, some are stylish, and some are designed to show off in low cut blouses.

Personally, most of my bras are entirely function and utility as I work as a welder. I'm covered head to toe in safety gear, so wearing a pretty or revealing bra just isn't practical.

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.

Edit: context: a big part of it is weight support.

I’ve got a childhood friend who got a reduction because she had back problems after she went through puberty, and it basically led to her having chronic pain for a while in college. She’s WAY happier at a C-cup than whatever size she had before.

Edit: curious what the downvotes are for. This is absolutely a real thing. Downvoting me for sharing a thing that real people actually struggle with isn’t going to make them struggle with it less. And on the hunch that the downvotes are dudes: if you have a female partner, or a female friend who you can ask these sorts of things to, ask them to confirm that it is real, and they will be happy to.

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'm a small breasted woman who does not wear a bra. The reasons of practicality and comfort are described below for bigger chested people (I didn't see mentioned that if they are really big and you try to run without serious, sometimes two sports bras on they can fly up and hit you in the face). I do sometimes accidentally hit my nipple on something, which I don't like.

But in my experience, people get upset at seeing boob shaped boobs. Strangers tell me I should be wearing a bra. They want bra shaped boobs. Nipples are scary.

I haven't worn one since middle school when it was new and fun and made me feel "grown up" (but uncomfortable). But some years back I got shingles and apparently permanent nerve damage on the nerve group that would be right under the bra band on my back and anything irritating it makes me feel like I'm on fire so it's just not going to happen. Certainly not in the name of sparing the general public the scandal of seeing boob shaped boobs in a loose T shirt. At the very most I will use silicone tape to hide my nipples in very formal situations.

Yes yes that's exactly it. You see nipples are sensitive and boobs tend to jiggle and sway around when one moves, it can get very uncomfortable. So a bra reduces friction and accidental brushing against objects and clothing, helps support the weight and yes also helps shape the bosom. All that.

The original purpose of the bra was to let women move freely without fearing their breasts might pop out of their dresses iirc. But I think women used to wrap their chests with a tight cloth if they had to heavy physical work before bras as we know them today. Take this with a grain of salt, I didn't fact check any.

So there is a fascinating historical rabbit hole here that I went down a few years ago. I think it is Nicole Rudolph who did a deep dive video into the history of bras and other shapewear. If you smoked a lot and like history I recommend it.
Bras and similar garments give the proper ‘shape’ for the clothes and cultural norms of the moment, and give people comfort and support if they need it. Lots of people need something sturdy to keep everything in place, but it’s also still a very grey area of social acceptance to choose not wear one.

Make:

• Bouncy things less bouncy
• Pokey things less pokey
• Gravity less gravit-y

I wear a bra because I feel weird when my tits are bouncing freely in public, or when I know that others can see my nipples. I don't think there's anything inherently wrong with going braless, but I definitely have been conditioned to feel weird about it, and it's hard to shake.

Yes, all of those things. Also it makes exercising more comfortable.

Every woman will be different but according to my wife it’s mainly for the support. I appreciated this more when I had a testicular injury where I needed underwear that lifts holds and prevents unnecessary movement.

I am also reliably told that the removal of a bra - particularly a tight one - at the end of a working day is almost as wonderful as the feeling of taking your socks off when you get home.

Bliss.

Advantages of bras:

• Look nice (if you're into that look, which many people are)

• Keep your nipples from chafing

• Support/containment for larger boobs

• Keep prudish people from being mad at your nipples

• Can be worn without a shirt for sports if they cover enough real estate

• When breastfeeding, help catch/absorb leaks

Disadvantages of bras:

• Uncomfortable if not fitted right
• Sweaty as fuck on hot days
• Expensive
• Many have to be hand washed if they are fancy

I would say I wear bras about 30-50% of the time and it's usually for either support/chafing prevention or looks. The rest of the time I can't be bothered. I'm also lucky to not have super large breasts. I know women who do may find a good fitted bra to be more comfortable than no bra.

When I was breastfeeding I wore them all the time though because it is super awkward to leak through your shirt in public.

Edited to add bullet points bc I suck at lemmy formatting

I have never needed one for support, but for the past 20, 30 years the US has had some sort of weird rule that only smooth lumps are professional, no hint of actual breast shape. That's easing in non-professional public life, finally, so I don't wear one a lot of the time, but at work wear something with light padding to make that weird Barbie doll lump shape.

Sports bra for running, yes that serves a practical function - holds the boobs still so they don't bounce and hurt. So if one is more endowed and bouncing in everyday life, I imagine that a bra with structural support would be more comfortable than nothing.

I really wanted to answer that the point is right at the front of each cup!

Have you ever tried running balls free, same idea.

Can't speak for all, but back pain and comfort. Also, large breasts can have difficulty getting air under there which can cause irritations. Sometimes it's just to keep your breasts off your stomach. I wear sports bras and have "special" bras, but my hatred of bras has really dimished when I accepted sports bra life.

I also just don't like them "loose?" Like, I don't want to bend over and have them go awol, even if I'm at home. Also, can store stuff in the bra and I have dropped my phone on the floor thinking I had a bra to catch it 😭

I'm actually quite interested in dress history. I'm an engineer at heart and clothing is fundamentally also an engineering problem (and design of course). It's an area of engineering that was always dominated by women and you can sometimes see the novel approaches that brings.

For example historical corsets were actually quite comfortable when fitted right. One reason why is actually breast support. Predecessors to the modern Bra did exist but were not in fashion as a more compressed looking bust and later a shaped silhouette was in fashion.

Also it's cool what tricks one can use to form the silhouette without extremely compressing the waist (which is how many modern people often think is the function of a corset).

I recommend Bernadettes channel on this topic: link

I am someone who has had very large breasts and fairly small breasts in my lifetime. When my boobs were big, wearing bras was manageability and comfort. They were heavy and hurt my back and were always in the way. In addition, it was hard to do any sports or be active without being, what I called, double strapped: having a bra with a sports bra over the top. This is how I got through high school.

Now that I’ve both had a breast reduction and lost a lot of weight, my boobs are smaller and I don’t wear a bra often. When I do, it’s a vanity thing, I think my boobs look better under some clothes when wearing a bra, and a utility thing, like when I’m working out or doing something strenuous. Also, I wear one when I’m at work because it seems more appropriate.

Breasts can get heavy, and the sensation of gravity constantly pulling down on the skin of your chest and on your soft tissue can be very uncomfortable. If you get sweaty, moisture can get trapped underneath and cause rashes or fungal infections. Moving about, they can get in the way of your arm movements and if jumping or running the movement can be downright painful. Imagine piercing your ears with heavy weights and then shaking your head. You would want to minimize their movement!

Historically, women have used woven cloth bandeaus, breast bands, belts, straps, stays, corsets, bralets, bodices and all sorts of things to try to minimize movement and support breast tissue. Bras are just the most common contemporary thing.

bras were a cheaper alternative to corsets. and yes, they were popular and not as oppressive as hollywood would have you believe, and they were considered good for back support. Bras didn't need nearly as much metal or time. And since they were cheaper, they were more common. At least, from things I've heard elsewhere.