If you look at the OP the word 'accidentally' is fairly crucial to the motif. In 'The Butcher and the Parson's Wife' the donning of the trousers is deliberate in order to facilitate the double cuckoldry. This in itself is a well-used motif, but a different one to the accidental donning found in the single cuckoldry of the French ballads and 'The Horned Miller'.
Sorry if this looks to be pedantic!