Donkey have worked together with humans for millennia. Traditionally, the scientific name for the donkey is "Equus asinus asinus" based on the principle of priority used for scientific names of animals. However, the International Commission on Zoological Nomenclature ruled in 2003 that if the domestic species and the wild species are considered subspecies of one another, the scientific name of the wild species has priority, even when that subspecies was described after the domestic subspecies. This means that the proper scientific name for the donkey is "Equus africanus asinus" when it is considered a subspecies, and "Equus asinus" when it is
Equus (play) the owner of the stables, Harry Dalton, and Alan agrees. Dysart meets with Dalton, who tells him that he first held Alan to be a model worker, since he kept the stables immaculately clean and grooms the horses, including one named Nugget. Through Dysart's questioning, it becomes clear that Alan is erotically fixated on Nugget (or 'Equus') and secretly takes him for midnight rides, bareback and naked. Alan also envisions himself as a king, on the godhead Equus, both destroying their enemies. Dysart gives Alan a placebo "truth pill". Revealing a tryst with Jill, he begins to re-enact the event.