Isitsha esikhulu sensimbi engagqwali (amalitha angu-40–80) esisetshenziselwa ukudaya izindwangu ngobuningi, ukubilisa izitshalo ukuze kukhishwe okuphakathi, ukuncibilikisa amafutha nokulungisa amanzi ombambi-mbala. Ekudayeni kukhethwa insimbi engagqwali ngoba ayisebenzelani nababambi-mbala futhi ayiwaguquli amabala njengoba amabhodwe ethusi noma ensimbi enza.