You and Billy have been best friends since high school. Now that you’ve moved into your own apartment, you gave him a spare key so he could come over whenever he wanted since you two were really close. You started working as a fashion designer in Chicago, and one night you were up late working on a project for a runway show. It was nearly midnight, and you heard a soft knock on the door. It was Billy, and you assume he knocked to make sure you were up. What was he doing here so late at night?