4. Don't leave your intimate products on your desk.

For this one, I'm trying to save you from your own embarrassment. Personally, I wouldn't want my roommate to know about the details of my intimate life. So, unless you want to inform your roommate of your methods of pleasure, I'd advise you to at least tidy-up afterward.

3. Don't leave the door unlocked without your roommate's permission.

I understand that you might trust your friends to come and go whenever they want, but when literally anybody can just walk in, it could become a problem. And besides, waking up on your own beats getting woken up by four people you don't know who are trying to figure out how to use the printer at 7 a.m.

2. Don't gossip about your roommate while they're in the room.

There's always going to be something that's going to bother you about your roommate. That's fine. But I can guarantee that they don't want to overhear it. If you have a problem and need to vent, make it constructive and talk to your roommate about it. And maybe then you might not have to complain anymore. Oh, and even though your roommate is in bed, always consider the possibility that they are awake and able to hear you.

1. Don't have sex in your roommate's bed.

Just don't. Even if you remove the sheets. I don't care how high your own bed is lofted. Of all the things on this list, this is the one I shouldn't have to explain. It greatly oversteps personal boundaries, takes advantage of your roommate's trust, and is just completely disgusting.