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This article studies family relationships around the management of young peoples’ outings and use of psychotropic substances. It questions the articulation between social outings and drug use, the information surrounding these practices, and the role of gender and family. Far from the complete transparence often claimed, there is a pragmatic and rhetorical game at work around trust and revelations on these outings and drug use, which structures both practices and exchanges on those practices. The adolescents’ increasing autonomy brings trust up against a paradox: the normalization of the use of secrets, even lying, within a relationship that promotes communicational transparency.