Pointing your pencil at a girl during class to declare your love for her.
The tip of your pencil (the part you write with) should be pointed at the girl you have a crush on so she can know you like her without you getting too embarrassed to go up and talk to her.
James: Yo why are you penciling Hannah? Do you have a crush on her?
Derek: Man I thought you already knew.
Hannah: Derek you like me? Meet me after school.