Pigs are Papuans' main asset. The number of pigs determine one' position, and wives are bought with pigs. The pigs sleep in the same hut as the women (the huts are constructed on 2 levels, the upper floor reserved for the women) and are educated to leave the village in the morning and come back in the afternoon. Dani villages are delimited by rock walls, and to enter a village, the wall has to be climbed over. Ingenious little doors are designed, however, to let the pigs travel in and out of the village. Incredible, but true!