Nice thread.
I don't have small boobs, so ever since I can remember I have always worn the correct bra size very important. Theres a chic who slept over at my place once , I was so damn shocked when she told me she didn't know her bra size. To me correct bra size is like your name, everyone should know their bra size.
So anyway, I love buying Lingerie and since January (no special reason) I buy lingerie every two weeks. My policy in clothing has always been, if you have more , then they wear out less. E.g if you have just 4 bra's how long do you expect them to survive?
Taking care of your lingerie is also very important, like
1. one should hand wash their lingerie in warm or cold water,it keeps the elastic functioning properly.
2. To avoid wear or tear, Soak your lingerie for a day or two prior to washing, which means you sugua them less.
3. also machine wash & dry can cause drastic shrinking back and fourth, giving the impression that you are wearing the wrong bra size.
4. Bleaching agents thin out the fabric. Avoid them.
5. Throw away your lingerie after a year , and buy new ones. If that is an expensive option, then everytime you buy a new one, throw an old one out.
6. Always file your nails

A rough nail, will cause a run/tear in a lace panty, and then the panty is as good as useless. There is nothing as hideous as a suruali iko na kiraka .. ama imeshona shonwa.
7. I
highly recommend that ladies always wear padded bras with a wire( even if you have big boobs) The pads of course vary in thickness. Your breasts look smoother , lifted and it feels good.
8. Finally, every ladys motto should be "be prepared" don't leave the house in bad underwear simply coz no one can see underneat.. you just never know where you end up

Plus I think one feels so damn sexy (especially on the inside ) in good lingerie.
Lingerie here is normally between 40 $ - 60$ in a kawaida shop. Our version of VS , as in the finer shops, just a piece of (bra) goes for 80$ plus. It takes a while to get used to the high prices, but mostly you have no choice but to buy, because we kind of have a monopoly in stores. So if one is a bit price sensitive, you can wait for a sale (discount)
It depends on ones clothing priority or interest. For instance, there are people who don't know that certain bras are only for certain clothes. Also when some people grow or gain weight, in their heads they continue to exist in the same bra size.