According to Freud, why do infants become attached to their mother?

Freud's theory of attachment centers around the concept of the oral stage of psychosexual development, which typically occurs from birth to around 18 months. During this stage, infants derive pleasure from oral stimulation, such as feeding. The primary caregiver, often the mother, plays a crucial role in this process by providing nourishment and comfort through breastfeeding. This act not only satisfies the infant's basic needs but also fosters a bond through the pleasurable experience associated with feeding.

When an infant experiences the satisfaction of hunger and comfort from the mother, it leads to a sense of security and attachment. Freud posited that this fulfillment of oral needs creates a primary emotional connection, suggesting that the nurturing relationship during this early phase is foundational for later attachments and personality development. Thus, the primary reason for an infant's attachment to its mother, according to Freud, lies in her ability to satisfy their oral needs and provide pleasure during this critical developmental stage.