England
The vast majority of women have multiple natural breasts.
Cos they all get implants
This all depends on your age. In women, breasts can grow until they are 18, sometimes older! If you are concerned you are pregnant, you will know because not only will your breasts get larger, but they will hurt tremendously!
Not on purpose. It has been known to cause women to gain weight which in turn would also make your breasts larger, nothing to extensive though.
Bras were invented to support breasts and make women more comfortable. They have added benefits like making breasts look larger or smaller.
This is a very debatable topic. For one the breasts of women vary in size and have to do with the genes handed down. Some women are born with big breasts, however the main topic that is debated upon is that so many women get boob jobs that it seems that breasts have become larger over the years. So if you are counting silicon breasts into your statistics then i would have to say yes because the percentage of women with boob jobs is much higher than the percentage of women with small breasts.
It is nomal for some women for their breasts to get slightly larger right before their period.
There is something called a breast reduction surgery for women who have shoulder or back pain from the weight of larger breasts. Working out reduces breast size naturally because breasts are fatty tissue. There are not products that reduce them.
Male breasts tend to have less glandular tissue and are generally smaller in size compared to female breasts. Female breasts are typically larger and contain more glandular and fatty tissue due to their role in breastfeeding. This difference is primarily due to hormonal influences during puberty and beyond.
The same reason why women cover their breasts nowadays, it was accepted by their culture to show breasts.
Because women are expected to have their own children, it is safer and cheaper for them to breast feed because the breasts are full of natural milk - not processed like we drink (skimmed, semi-skimmed, full fat, etc...). That's mostly why women have breasts, so they can feed their off-spring. If you meant male breasts, then they just have an overload of breast tissue which gives them smaller, saggier breasts.
dropping of the breasts is a natural process that happens to most all women at certain stage of their life. it happens when the nipples fall below the crease of the breast. ezinearticles.com/?What-Causes-Breasts-To-Sag-or-Droop?&id=769777