Milk products and their fermentation have had an important influence on some cultures’ development. This is the case in Mongolia, where people often practice a pastoral form of agriculture. The milk that they produce and consume in these cultures is mainly mare milk and has a long tradition. But not every part or product of the fresh milk has the same meaning. The fattier part on the top, the "deež", is seen as the most valuable part and is therefore often used to honor guests.