 All of Porky's subsequent appearances in the classic era would be with other characters such as Daffy or the non-speaking, house cat version of Sylvester.The title refers to "The Wearing of the Green", an old Irish ballad, while the green shoes themselves are borrowed from the 1845 Hans Christian Andersen fable "The Red Shoes" (and the 1948 film based on it) about a pair of ballet shoes that never let their wearer stop dancing.The title was parodied, also as "The Wearing of the Grin", in the Bugs Bunny cartoon "What's Up, Doc?