Where is a child's erogenous zone during the oral phase according to Freud?

During the oral phase, which is the first stage of Freud's psychosexual development, a child's primary focus of pleasure centers around the mouth. This phase typically occurs from birth to about 18 months, where infants experience the world through their mouths. Activities such as sucking, biting, and chewing are crucial as they not only provide sensory pleasure but also help in exploring their environment. Thus, the child's erogenous zone during this phase specifically involves behaviors associated with the mouth, including putting things in their mouth and biting. This is a key aspect of their development as it assists with both nourishment and sensory exploration.