Hi, I too was well endowed as a teenager/young woman, (16DD) but I though it fantastic, I was never without a boyfriend! I was lucky enough to marry the right man, and breastfed both my children. I then decided to have a breast reduction for my 40th birthday (by then I was an 18F). Now I feel as light as a feather and as free as a bird.
My daughter is well endowed as well, but she doesn't feel self conscious, maybe because she is at an all girls school, and there are other girls there who are also large. Anyway, she has no thought of having a reduction as yet. She plays basketball, but she doesn't really run!!
What ever the future brings I will support her in what ever decision she makes.