also something that a lot of guys do when they like a certain girl.
guys sometimes get physical with girls in a casual and playful way if they like them. this can mean giving you a playful little punch to the shoulder or brushing your hair back when it gets in your face.
learning about all of the signs that a guy likes a girl will really help you recognize when you have a wonderful opportunity with someone great. while not all guys display these signs, they are fairly common with most men. 