> He cut down his own banana.
A man supplies fertilizer (money) for a banana tree that, eventually, provides fruit (gifts of food). The cycle, in this saying, is compared with that of the food-money cycle of a marriage in which the wife's clan provides food and service, while the husband's clan provides occasional payments of money. If a banana tree is cut down before it bears fruit, the cycle is interrupted. Hence, a man who marries incestuously within his own clan and thereby inhibits the foodmoney cycle.