웃음, or "laughter," is a natural response to humor or joy. It involves the contraction of facial muscles, particularly around the mouth, and often produces a sound. Laughter can be triggered by jokes, funny situations, or even social interactions. It is a universal expression found in all cultures and is often associated with positive emotions. Laughter has several benefits for both mental and physical health. It can reduce stress, improve mood, and strengthen social bonds. Additionally, laughter releases endorphins, which are chemicals in the brain that promote feelings of happiness. Engaging in laughter can enhance overall well-being and foster connections with others.