There is this piece that some might consider humorous, the toilet humour is not all that funny to me but some may find it funny.
Behind the banality lies an interesting story. Götz von Berlichingen was a German Imperial Knight who famously told said the following as attributed to him in the play made by Johan Goethe that was based on his life.
Famous quote The first version of the drama included a quote that
gained fame fast. In the third act, Götz is under siege by the
Imperial Army in his castle at Jagsthausen. The captain of the army
asked him to surrender; from a window, he gives his answer:
Mich ergeben! Auf Gnad und Ungnad! Mit wem redet Ihr! Bin ich ein
Räuber! Sag deinem Hauptmann: Vor Ihro Kaiserliche Majestät hab ich,
wie immer, schuldigen Respekt. Er aber, sag's ihm, er kann mich im
— Johann Wolfgang von Goethe, Götz von Berlichingen mit der eisernen
Hand, act 3, Goethe's Werke, vol. 8 (1889), p. 109 It can be
Me, surrender! At mercy! Whom do you speak with? Am I a robber! Tell
your captain that for His Imperial Majesty, I have, as always, due
respect. But he, tell him that, he can lick me in the arse!
This became such a sensation that it entered into folklore. Mozart must have seen the play by Goethe and must have been amused by the sheer banality of it all and decided to write that particular song about it.