El trabajo pretende analizar las razones y las implicancias de que en el marco de las campañas tendientes a erradicar la violencia de género una novela romántica que plantea una relación de sumisión femenina, incluido el sado-masoquismo en escenas de alto contenido erótico, ha triunfado en el segmento de mujeres de mediana edad, casadas o con hijos, no regularmente asociadas al erotismo, tomando en cuenta la vigencia de la fantasía analizada por Freud en su texto “Pegan a un niño”, de 1919. Palabras clave Fantasia Sexual, Sadomasoquismo, Violencia de Genero ABSTRACT LIGHTSAND SHADOWS (50) OFA MASOCHISTIC FANTASY - OSTENSIBLE CONTRADICTION’S ANALYSIS BETWEEN THE ABOLITION’S FIGHT OF GENDER VIOLENCE AND LITERARY SUCCESS OF A NOVEL ABOUT A SADO-MASOCHISTIC RELATIONSHIP The paper analyzes the reasons and implications of that in the context of campaigns to eradicate gender-based violence a romantic novel based in a relation of female submission, including sado-masochism in highly erotic scenes, has succeeded in the middle-aged women’s segment, married or with children, not regularly associated with eroticism, bearing in mind the validity of the fantasy analyzed by Freud in his text “A child is bitten” of 1919. Key words Sex Fantasy, Sadomasochism, Gender Violence