The ESPARA study is a multicenter observational research project aiming to monitor, over a three-year period, the evolution of sexual symptoms in male sexual offenders with paraphilia, divided into three groups: receiving antiandrogen treatment, receiving selective serotonin reuptake inhibitors (SSRIs), or no pharmacological treatment. The primary objective is to assess changes in sexual desire intensity and deviant sexual behaviors, while secondary objectives include relapse rates, the role of psychiatric comorbidities, treatment tolerability, and various clinical, cognitive, and life-history factors.