of pleasure". The first volume's cover sees Shakira holding a baby girl in her arms; the artwork for the second album shows a nude Shakira (covered by tree branches), with the infant sitting in the tree. She stated that both covers alluded to psychoanalyst Sigmund Freud's theory that infants begin discovering the world through their mouths during the oral stage of psychosexual development. For Jon Pareles of The New York Times, "For obvious reasons, [the artwork for the second album is] eye-catching, as was the cover of the Spanish-language companion album, Fijación Oral, Vol. 1". On 23 January 2007, Fijación Oral, Vol. 1 and Oral Fixation, Vol. 2 were released as a three-disc box set, titled Oral Fixation, Vol. 1 & 2. Each record was on a separate disc, and was packaged with a DVD featuring music videos and live recordings of album tracks. The compilation peaked at numbers 13 and 27 on the Billboard Latin Pop Albums and Top Latin Albums charts. Composition Fijación Oral, Vol. 1 is a Latin pop album. The introductory track, "En Tus Pupilas" ("In Your Pupils"), incorporates folk music styles and its opening verse includes French-language lyrics. "La Pared" ("The Wall") has been compared stylistically to the 1980s duo Eurythmics. "La Tortura" ("The Torture") features Spanish singer-songwriter Alejandro Sanz, with elements of Colombian cumbia music, dancehall and electronica. "Obtener un Sí" ("Obtain a Yes") is a bossa nova song with cha-cha-chá elements against an orchestral background. "Día Especial" ("Special Day") features Argentinean singer-songwriter Gustavo Cerati on guitar. The sixth track, "Escondite Inglés", has a new wave feel. "No" also features Cerati on guitar, using a simple melody to emphasize Shakira's vocals. "Las de la Intuición" ("The Ones with the Intuition") has synth-pop elements, while "Día de Enero" ("January Day") has been compared to Mexican singer-songwriter Natalia Lafourcade. "Lo Imprescindible" ("Bare Essentials") has German-language verses in which Shakira lyrically expresses "Come baby come. Don't ever leave me". The disc concludes with an acoustic version of "La Pared" and the Shaketon remix of "La Tortura". Singles "La Tortura" was released as the lead single from Fijación Oral, Vol. 1 on 12 April 2005. It features Spanish singer-songwriter Alejandro Sanz, and was praised for its production and reggaeton influence. "La Tortura" was the only single from the album to chart on the US Billboard Hot 100 (peaking at number twenty-three), and reached number one on the Billboard