"Secreta Mujer" is a song by the Spanish singer-songwriter Joan Manuel Serrat. The lyrics portray a man who is unable to sleep because of a secret woman in his life. He describes her as being both alone and moon-like, someone who opens his eyes and forces him to see his misfortune and fortune. However, she also does not bring him any fortune and prevents him from sleeping. The lyrics express the man's frustration and desire to be free from this woman's influence. He asks her to tear off his clothes and strip away his doubts, symbolizing his yearning to be vulnerable and honest. He pleads with her to leave him and let him go, but he finds himself unable to speak and express his true feelings, as if she is trapped in his throat. The man is tormented by this woman, whom he refers to as a secret woman. The song explores themes of love, desire, and frustration. It speaks to the emotional turmoil and inner conflict experienced by the protagonist, who is torn between wanting to let go and being unable to fully detach himself from this mysterious woman.