In Yuai, a young man from the Lou Nuer tribe puts his arm in the air to imitate the horns of the cows. Horns are a symbol of power. The South Sudanese take great care in twisting the horns of cows so they grow longer and bigger.
In South Sudan, the number of cows in a family defines its wealth. Cows are also used as a way to pay for the dowry when a son wants to get married. They are also used to get weapons on the black market, one kalashnikov is worth three cows.