But actual youngest siblings – and the therapists who work with them – say it’s also one of the most wrong. “Some youngest siblings may get more freedom, have fewer responsibilities and grow up with less strict versions of their parents,” Oscarson said. AdvertisementThere is also grief work in untangling their true identity from the role that was assigned to them by virtue of birth order. After all, birth order is a fascinating topic that can shape many of our experiences. Ultimately, the work is less about birth order and more about understanding the specific story you were handed.