Short answers, pulled from the story.
Wolfgang Amadeus Mozart wrote a rhyming letter containing scatological phrases like shit in bed so it makes a noise. Endocrinologist Benjamin Simkin estimates that thirty-nine of Mozart's surviving letters contain such passages.
Mozart composed the piece known as K. 231 which includes the words lick me in the arse quickly. Musicologist David J. Buch notes these pieces took the form of rounds where each voice enters with identical music and text after a delay.
German popular theatre featured stock characters like Hanswurst because such vulgarity served as political counterpoint against hereditary aristocracy ruling society. Folklorist Alan Dundes suggests tolerance for bodily functions remained a trait within German national culture.
No expert organization has voiced concurrence that credible evidence exists proving Mozart had Tourette syndrome. Neurologist Oliver Sacks published an editorial disputing claims made by endocrinologist Benjamin Simkin regarding tics characteristic of the condition.
Constanze Mozart sent her late husband's Bäsle letters to publishers Breitkopf & Härtel hoping they would prepare a biography but stated the letters could not be published entirely. Historian Lucy Coatman argues this ambivalence resulted from changing tastes spreading through the rising middle class during the early nineteenth century.