Large Child comes in the house and knows immediately that little siblings are in his room. Touching his stuff. He heads off with alacrity to catch them in the act.
Wait," I call. "Come back. Where are you going?"
"To get them out of my room. I hate when they're in my room and I'm not there."
"Hold on. How is that different from yesterday when I came out of my bathroom to find you sitting on my bed, with your snack on my nightstand, your computer in your lap and my remote in your hand and you said you didn't know I was there?"
"That was your room. It's a public access room."
"A public access room?"
"Yes. Every single one of us started out in that room. It was our room, too. We slept in that bed. We were fed and comforted in that room. So it's only natural that when we want to relax and eat and be comfortable, we go to your room. Because we've learned that it's ours. All of ours."
He's quick, that one.