Central to the film is the song "Lo Dudo" ("I doubt it") a bolero by Los Panchos, a Latin American trio formed in the 1940s. "Lo Dudo", written by Los Panchos's second voice Chucho Navarro, has been immensely popular. It epitomizes Antonio's love for Pablo and he sings it during their last hour together. Almodóvar described the song as key in the film. A song of spurned love, its lyrics fit the plot referring in the film to Antonio's love for Pablo and his belief that Pablo would not find a purer love than his.