To enter an ear of the horse, to take something from an ear of the cow
An animal (a demonic being) asks the hero or heroine to take objects necessary for him (her) from its ear or to enter its ear to make himself or herself handsome, to sleep. etc.
While person is asleep, another smears with excrements or something that reminds excrements his or her bed or clothes. The ashamed person runs away or agrees to make what the trickster wants in exchange of his silence