Coprophobia is fear of or aversion to feces or defecation. In humans, the attitude to feces and defecation has become a cultural taboo. In the animal world, many herbivorous grazing animals including cows, sheep, horses, and reindeer avoid feces when feeding. Primates also prefer to forage away from feces-contaminated areas. The aversion is believed to be a strategy to avoid infection. References Phobias Excretion Ethology