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Dogs use their sense of smell to gather information about new people, which is crucial for their understanding of the environment. Their olfactory abilities allow them to detect scents that humans cannot, revealing emotional states and other details about individuals. For instance, dogs exposed to scents from frightened people show signs of stress, while familiar scents elicit different reactions. They are particularly drawn to areas of the body with apocrine glands, which provide rich olfactory information. This behavior is natural and essential for their exploration, helping them recognize past encounters and navigate their surroundings. Allowing dogs to sniff is important for their social interactions and understanding of the world.