This article argues that masculinity is not innate but rather a psychic formation shaped by early identifications, processes of separation, and experiences of loss. By tracing the developmental trajectory from the boy's initial identificatory union with the mother toward paternal identification, it demonstrates that the process of becoming male is intertwined with experiences of separation, differentiation, and the narcissistic injuries they entail. When these experiences are not sufficiently worked through, masculinity may assume rigid and defensive forms, and feminine identifications may fail to be integrated into the psychic structure. In this context, the function of the father is decisive, as he provides a third position that enables the boy to integrate both masculine and feminine identifications. Mature masculinity develops not through the denial of difference but through the capacity to symbolize loss and integrate diverse identificatory positions.