In the Nymph tribe, every year there is a new wave of women being impregnated. Due to the specialty of the tribe, quite a lot of the tribeswomen are very reluctant to sire a child. This is due to the fact that taking care of a child can be a troublesome process. One begins with a whole year of barely being able to do anything and the end of one very painful day of labor. Without strong sexual desires, it made sense that the women would be very averted to giving birth.
But among this peculiar tribe, there was a family line that oftentimes, if not always, welcomed a birth. This was the -Nna family. The main reason this particular family is mostly interested in giving birth is because they have a particular set of gifted breasts. Their breasts are able to produce milk in much greater amounts than most other people.