Why do I have small boobs but large nipples?

Everybody is unique. Human beings are naturally asymmetric. No woman has the exact same breast on each side and no two women have the exact same breasts. So there are twice as many different breasts as there are women. All individuals are unique and that includes breasts. If you wish to change the appearance, consult a plastic surgeon certified by the american board of plastic surgery (www.Abplsurg.Org).