I know that line from a somewhat famous song by Stephan Remmler. It was a big hit in Germany back in 1986 when the "Neue Deutsche Welle" was hip (at least in Germany). Here's the YouTube-Link: https://www.youtube.com/watch?v=582FrJaDMOk. "Alles hat ein Ende, nur die Wurst hat zwei / Jawoll, mein Schatz es ist vorbei. / Doch du musst nicht traurig sein, du bist ja nicht lang allein / denn alles hat ein Ende nur die Wurst hat zwei / Mein Schatz, es ist vorbei." What does that classy piece of lyrics mean? That guy is breaking up with his girl friend and he's comforting her by stating that all things must end. The only exception is sausages. That sounds quite weird – and that's exactly what "Neue Deutsche Welle" was about:)