One breast may become a bit bigger than the other breast. In fact, no one has two breasts that are exactly the same size, but usually this difference is not very noticeable. The shape of the nipple also varies a lot. Some women's nipples turn inwards. Instead of pointing out, they sink into the areaola.
Breasts have different meanings in different cultures.
In some cultures, it si fine for women to go bare breasted. In other cultures, doing this would be considered very shocking and indecent. In most places, however, growing breasts is a big event in a girl's life. It is a sign of growing up. Most girls come to like their breasts.