My brother has studied several types of martial arts for years, including Jeet Kun Do, ninjitsu, and kung fu, as well as being a Golden Glove boxer.  He taught me several kinds of defense moves so that I could fight off an attacker if God forbid I ever had to, and one of the things he always stressed to me and his two sons was that martial arts was not something you should ever use to play around with or to harm unless it was a situation where someone was going to harm you.  He said that as a student of martial arts you had to respect the fact that this was a discipline that was dangerous and not to be taken lightly, that your hands and feet were like weapons and you should never draw a sword or knife unless you meant to use it. 

My mother was a great believer in a few smacks with a wooden spoon when we didn't listen for the third or fourth time and were beating the crap out of each other or had backtalked her one time too many.  I was the youngest and so rarely ever got smacked because I had learned from watching my older brother and sisters how far to push her.  But I do recall one time when my brother and older sister were teenagers, probably around Harry and Draco's age, and going at it like cats and dogs, screaming, punching and scratching. My brother nearly pushed my sister through a screen door, and neither of them stopped when mom told them to, so she whacked them with the spoon and THAT made them stop.  From shock, I think. It was quite embarrassing, as both were in high school at the time!

As for them sharing a room, that idea was given to me by a friend of mine whose mother did that with her and her younger sister, who was adopted. They were always fighting over which one was loved better by their parents, and it got so bad that her mother decided the only way to resolve the situation was to make them share a room and learn to get along that way.  It worked, and now they get along great. I figured that would work well for Harry and Draco too. Sometimes all it takes is time to sit down and listen to someone's side of the story to realize how much you have in common.

You'll learn more about the Fae world as this story goes on, and I go into more detail with the sequel to this one.  A lot of the fae world I've based off of my research into Celtic and Arthurian legends as well as some fairy tales.  My minor in college was mythology so I use a lot of that here and have fun doing so.  Believe me, I wish it were real too, I'd go live there myself!