When one sees the word “Erotica” in connection with classical music, one is usually safe in assuming that it’s a misprint in the title of Beethoven’s Third Symphony. And yet, at the Australian Chamber Orchestra’s concert on Saturday, it was no Freudian slip: Erwin Schulhoff’s Sonata Erotica, which the composer suggestively marked “nur für Herren” (for men only), was on the program.