The mammarification is only practised in the large region Nevilleheim in the south of Freya's realm.
The mammarification-machines encloses the willing woman's entire body except for the breasts. During the transformation the woman's breasts swell, until they are at least as large as watermelons, some can reach the size of beach balls. Eventually both breasts will simply fall off and nothing else is left of the woman.
Each breast is an independant being with the full memories and intact mind of the former woman. Thus each breast is regarded as single person. Each breast can see, hear, eat (via vagina), speak (via anus) and move around by hopping or rolling. Usually a woman's family keeps one of her breasts which fullfills a role as beloved sex-pet. The other breasts or those breast-women that do not have a family to go back to, live in the boob-farms. The farmers care very well for the women in the farms and do their best to keep them entertained and healthy. Each breast-woman is milked at least three times a day and the milk sold to the rest of the realm."