Inclusion Criteria:  18-60 year old male Heterosexual Right-handed (Manual laterality test) With a sexual addiction (PEACCE Tool> 3 and Carnes ≥ 13/25) except for controls Having signed a written and informed consent Subject benefiting from social security  Exclusion Criteria:  Subject presenting a medical pathology requiring drug treatment, Severe psychiatric pathology (bipolar disorder, hyperactivity or schizophrenia) or another addiction (alcohol, illicit substances or behavioral addiction) Subject consuming psychotropic drugs in progress or during the last month Subject not understanding French Subject under tutorship or curatorship Subjects with neurological disease including epilepsy or a history of head trauma Subjects hospitalized in enforced hospitalization Subject presenting a contraindication to tDCS: subject with an electrical or metal brain implant Subject with a contraindication to MRI