I did have that magical como of boobs and small waist - even when I had a brief bout of anorexia in college (85 pounds and still a C cup, if you can believe it) - but three timnes since college I have found myself 15 pounds heavier than I wanted to be and went on a diet. Each time I lost the extra weight, I kept what I had gained on top. So I eventually got to a DD. I can't say dieting is like childbirth, but it ain't fun so I think we both can say that we got some of what we got the hard way. For the past three years I have been exercising 5 times a week and if I can stick with it I don't think I will ever need to worry about dieting again.
I've been bellydancing, so hopefully it will eventually work. I just don't get it, though. My clothes are looser, I look smaller than last year, but my waist is measuring the same. Ergh!