Hard for me to fathom how measuring the weight of one's breasts would help with overall fit. I'd suppose my breasts weigh about the same as they did when I was 22. They just aren't in the same places.

But I do like this comment: "If men wore bras you can bet your life a bra would have been designed which fits, flatters and feels comfortable to wear!"- Leanne, Notts UK

UPDATE: I like the looks of this line.

UPDATE II: Now I'm thinking, how could I be so sexist as to agree with Leanne? Where are the women engineers looking to our comfort? They darned sure aren't designing shoes. And it is an engineering problem rather than a fashion problem, at least at my age.