Sucking is a natural action where a person or animal draws in air, liquid, or food through the mouth. This behavior is essential for feeding, especially in infants, who suck to obtain milk from their mothers. Sucking can also occur in various contexts, such as when using a straw or during certain medical procedures. In addition to its role in feeding, sucking can provide comfort. Many babies suck on pacifiers or their thumbs as a way to soothe themselves. This instinctive behavior is part of the sucking reflex, which helps ensure survival by facilitating nutrition intake.