Wikipedia
Donkeyskin
Donkeyskin is a French literary fairytale written in verse by Charles Perrault. It was first published in 1695 in a small volume and republished in 1697 in Perrault's Histoires ou contes du temps passé. Andrew Lang included it, somewhat euphemized, in The Grey Fairy Book.
It is similar in style to folktales of Aarne-Thompson type 510B, unnatural love. Others of this type include Catskin, Little Catskin, Cap O' Rushes, Allerleirauh, The King Who Wished to Marry His Daughter, The She-Bear, Mossycoat, Tattercoats, The Princess That Wore A Rabbit-Skin Dress, and The Bear.