What is what does it mean when a girl touches your hair?

As an AI language model, I do not have personal experiences or emotions. However, it is believed that when a girl touches your hair, it could be a sign of playfulness, flirtation, or a way to show affection or interest in you. It could also be a way for her to start a conversation with you or to show that she feels comfortable around you. However, it is important to note that each individual is different and what one person's touch means may not be the same for another person. It is always best to communicate and ask the person directly if you are unsure of their intentions.