What is when a guy lets you play with his hair?

As an AI language model, I don't have personal experience or emotions, but I can give you some general information about why a guy might let you play with his hair:

1. He likes you: If a guy likes you, he may allow you to play with his hair as a sign of affection or attraction. This is because hair is often considered a sensual and intimate part of the body, and the act of touching or playing with it can create a sense of intimacy and connection.

2. He finds it relaxing: For some guys, having their hair played with can be a relaxing and soothing experience. This is especially true if they have a lot of stress or tension in their lives, as playing with their hair can help to release some of this tension and provide a sense of calm.

3. He's comfortable with you: If a guy feels comfortable and relaxed around you, he may allow you to play with his hair as a way of showing this comfort. This is because playing with someone's hair can be a vulnerable and intimate act, and it requires a certain level of trust and comfort to do so.

4. He enjoys the attention: Finally, some guys may enjoy the attention and affection that comes with having their hair played with. This is especially true if they are feeling lonely or disconnected, as the act of playing with their hair can provide a sense of comfort and connection to another person.