Canon for 3 voices in B-flat major, KV 233/382d "Leck mir den Arsch fein recht schön sauber"

In 1988, Wolfgang Plath presented evidence that the composer of this piece, as well as K. 234/382e, was in fact Wenzel Trnka (1739–1791). That Mozart might not be the author of K. 229, K. 230, K. 231, K. 233, K. 234 was already mentioned in the Bärenreiter Neue Mozart-Ausgabe (NMA) in 1974. The Trnka canon's original lyrics were "Tu sei gelosa, è vero," but Mozart set the canon to his own scatological lyrics. Mozart's widow Constanze Mozart submitted the modified canon to publisher Breitkopf & Härtel.