Myths, folklore, and symbolism
Donkeys: Donkeys, proverbially stupid, obstinate, and over-sexed, were despised, yet the cross on their backs was a holy marking, since Jesus rode a donkey. Nineteenth-century sources credit them with healing powers; children suffering from whooping cough, measles, fevers, or rickets were passed three or nine times over and under a donkey, or made to wear or swallow hairs from this mark. (Oxford Dictionary of English Folklore)
Do you know of donkey folklore from other countries?