"Erotica" is a concept album about sex and romance, on which she incorporated an alter-ego named Mistress Dita, heavily inspired by actress Dita Parlo. Musically, it is a dance, electronica, hip hop, deep house and R&B record which incorporates elements from classic disco, modern house, techno and new jack swing. Lyrically, the album played on innuendos and double entendres instead of explicit words. "Erotica" is the opening track from the album. Starting with Madonna saying "My name is Dita", she invites her lover to be passive, while she tells him to "do as I say" and leads him to explore boundaries between pain and pleasure. It deals with sex hang-ups, and has been described as "an ode to S&M". Her cover version of "Fever" follows the title track. It is described as a "sassy, house-style remake" of the pop standard. The third track, "Bye Bye Baby," starts with the declaration, "This is not a love song," and goes on to ask questions of a lover she is about to abandon. At one point, Madonna asks angrily: "Does it make you feel good to see me cry?" The fourth track from "Erotica", "Deeper and Deeper," is described as one of the "pure disco" moments of the album. Its bridge features a flamenco guitar, and its lyrics talk about sexual obsession.