This document discusses how gender is learned from birth through socialization. It begins by asking a series of questions about remembering one's own experiences with learning gender as a child. It then defines gender socialization as the process of learning gender norms and developing a gender identity. A key part of socialization is determining an infant's sex at birth. However, in some cases of intersex infants, external and internal genitalia can be ambiguous, making sex assignment complex. Determining biological sex is not always as straightforward as it initially appears.