KISS, in the context of affection, refers to the act of pressing one's lips against another person or object as a sign of love, care, or greeting. This gesture can vary in meaning based on cultural norms and personal relationships. Kissing can express romantic feelings, familial love, or friendship, and it often plays a significant role in human bonding. The act of kissing can also release hormones like oxytocin, which promotes feelings of closeness and attachment. Different types of kisses, such as a peck on the cheek or a passionate kiss, convey varying levels of intimacy and emotion.