One of the most striking features of the Aliens that arrived on Earth was their humility. They had gone to the trouble of learning our language (well, Spanish and Cantonese at least). They brought gifts of books of literature and science and CDs of music. They were intelligent, creative, and highly courteous. In short, they were wonderful ambassadors for their planet.
Of course, in the main, the Earthlings were not very impressed with them. The Alien literature wasn’t as good as Earth’s. Where was their Shakespeare? Who were their great scientists, such as Newton and Einstein? And as for their music... Oh goodness me! What incomprehensible nonsense!
What did the aliens think of Bach and Mozart and Beethoven? Wasn’t Earth’s music more heavenly? More expressive? Such a rich heritage!
The Aliens explained that their music was different for all sorts of reasons, but so as not to be arrogant, they were leaving three of their more notable pianists behind so they could study Earth’s classical music in greater depth. So stay behind on Earth they did.
The first thing the Earthlings did was to chop off nineteen of each Alien’s fingers. If you are going to play Beethoven properly you can’t do it with twenty-nine fingers.