The severity of your drunkenness and exactly what it means/how to cure it in the morning
Your roommate has firsthand experience with every drunken memory you’ve had all semester. They’ve watched you stumble through the door, collapse on the floor, and maybe even get sick a time or two. They’re such experts with your drunken endeavors that they may even be able to determine what you drank just by how you’re acting. Not only that, but they also know exactly how to deal with you when you get home and the next morning. Water. Crackers. Advil. Repeat.