sentences:  The song is a twelve-bar blues in the key of G. Bassist Dusty Hill has said the song was written at a sound check in about ten minutes.The recording was produced by Bill Ham and recorded and mixed by Terry Manning.The title is a double entendre, referring both to slang for buttocks (with the connotation of "a piece of ass"), and slang for "luxurious" or "lavish", according to a 1985 interview with Dusty Hill in "Spin" magazine.