At the request of the medical department of a county jail, the Yvelines Departmental Health Education Committee launched a health prevention initiative to promote healthier behaviors among inmates aged 15 to 25 and to support their future reintegration. A preliminary consultation was held with all internal partners. The tool chosen to create a participatory and relational dynamic was theater, which facilitates self-reflection, communication, and the transfer of knowledge... This work prompted reflection on the role of health education and the ethical principles it must uphold.