have you noticed that often ladies have one breast bigger than the other....
I've been doing a bit of a survay over the past few years - well to be more accurate since I hit about 12years old ;) - from my investigation it appears that a woman will have the breast that is opposite her writing hand bigger - so if they are right handed the left tit is bigger and vica versa. I put it down to th body trying to maintian homeostasis - so as the dominant hand is used more that side of the body is subjected to more stress - the body tries to compensate by growing - but since the dominant side is used more it has less rest so grows less.