The song "Dolent De Mena" (Malo Por Naturaleza) by Joan Manuel Serrat and Joaquín Sabina tells the story of a man who revels in being evil and enjoys killing for the sake of killing. The lyrics depict him as a ruthless and heartless assassin, taking pleasure in the act of murder. The protagonist admits to being a "mala bèstia" (a bad beast) and a "malparit" (wretched). He describes himself as a serial killer with a dark and twisted nature. Despite his crimes, he boasts that he is never caught or suspected, leaving no traces behind. The lyrics describe the act of killing an insignificant beetle, not out of hygiene reasons or self-defense, but purely for the pleasure of it. The killer takes delight in the sound of the beetle being crushed under his foot, comparing it to the feeling of power it gives him. The song portrays the killer's lack of remorse or guilt for his actions. He sees himself as an artist and revels in the control he has over life and death. The act of killing brings him a sense of satisfaction similar to the feeling one gets after smoking a potent joint. The protagonist suggests that his crimes are meticulously planned and executed. He carefully chooses the time, usually during the dark of night when everyone is asleep, to carry out his killings without being detected. He sees himself as methodical, scientific, and cerebral, making sure to leave no evidence behind. The lyrics describe the act of killing the beetle in detail, emphasizing the cruelty and sadism of the protagonist. He takes pleasure in immobilizing the beetle and then brutally kicking it, leaving it defenseless and trembling. The lyrics also mention the size of the protagonist's foot, suggesting that it adds to the power and dominance he feels. After the act is done, the killer feels a surge of adrenaline and satisfaction. He meticulously cleans the crime scene and returns to his normal life as a loving father and husband, hiding his darkest instincts from the world. The song's title, "Dolent De Mena" (Malo Por Naturaleza), translates to "Bad by Nature" in English. The lyrics explore the mind of a character who is inherently evil, finding pleasure in committing heinous acts without remorse. It serves as a disturbing portrayal of a cold-blooded killer driven by his disturbing desires.