No children. thats it really. its the one room thats away from being parents thats just 'ours' so i dont let the kids in
I completely understand. Our little one isn't allowed in our bedroom either. When I lived with my mum, I shared a bedroom with two younger brothers. Only rule we had then was that I was boss, simply because I was older.
Now that I only share with my other half, the only rule is... What happens in the room, stays in the room.