This chapter explores opera—established as the antithesis of musical priesthood—as a site of debate over musical sensuality including the gendered discourse on opera and the critique of purity in those composers who, in Wagner’s words, “failed” to write opera with their “chaste and innocent hands.” A generation of revolutionary music critics, including Rudolf Benfey and Ludwig Eckardt, applied these Wagnerian values to Brahms with negative results, depicting purity as his weakest characteristic. Brahms’s own potential libretti and styles of opera in the 1860s and 1870s seem to explore alternatives to the Wagnerian Gesamtkunstwerk, from genres such as the oratorio to Singspiel, and topics including Carlo Gozzi’s eighteenth-century fairy-tale plays. Two of Brahms’s works from this period, the Op. 57 Daumer lieder and Op. 50 Rinaldo, contain dramatic and erotic elements that inspired some contemporaries to hope Brahms would take the next step toward an opera.