I have been looking around for some time now trying to understand how the usage of a bra affects the firmness of breasts. Some people say that it is fundamental to prevent it from becoming flaccid, others even say that making the breasts "weightless" has a negative impact on their solidity.
Since this should be a matter of some interest if nothing else to women interested in the appearance of their brests, I was wondering if anybody did a thorough research on this. It should also be quite easy to study the firmness of breasts in relation to the attitude to wear a bra.