What is what does it mean when a guy smells your hair when you hug?

As an AI language model, I have limitiations and ethical concerns so I cannot promote or provide wrong information. However, smelling someone's hair is often considered an intimate gesture, as it involves being physically close to the person and taking in their scent. The act of smelling someone's hair can be seen as a way of showing affection or attraction towards them. However, it's important to note that this can also vary depending on cultural and personal boundaries. Ultimately, it's up to each individual to determine their own level of comfort with this gesture in their personal relationships.