Mozart behaving badly: "Mozart had numerous obsessions: clocks, cats, shoe sizes, his wife's safety - he had an unnatural fear of letting her out of the house. There is evidence of him twitching, grimacing, tapping his feet together and behaving oddly... Fugue and counterpoint became an obsession and he reinvented them: the contrapuntal complexity of his six "Haydn" quartets baffled his friends....Fugues appear to be chaotic but are rigidly and beautifully structured. Mozart loved to write passages that broke all the rules, yet needed to keep them within a tight overall musical structure."
