Rule #4: Don’t have sex in one of the communal showers. People will hear you, they will tell other people, and before you know it, everyone in your dorm will know. Plus, ew. Just ew. There’s a reason you have to wear flip-flops in there.
Rule #5: Do not take anything from the kitchen unless you brought it there. If it’s communal, people will leave food and dishes there. How would you feel if someone stole your expensive mochaccino caffeine-less beverages from the fridge? Not good, that’s how.
Rule #6: Clean up after yourself or forever bear the pain of your dorm-mates complaining to each other about how messy you are.
Rule #7: Don’t start making out with your latest love interest while your roommate is in the room, unless you want to completely alienate and/or repulse her. She doesn’t want to see that, and you wouldn’t want to be subjected to her PDAs either. Think about just sitting around, doing your psych homework, only to realize with growing horror that those wet sounds you’re hearing… yeah.
Rule #8: Think long and hard before hooking up with someone who lives in your dorm (aka dormcest), especially if they’re on the same floor as you. Remember that you will probably see them every day for the entire school year. Remember that even if it feels good now, it has incredible awkward potential—and since you live together, that awkward will spread like wildfire to everyone in your dorm.