Where's Lake?

That's what I said this morning when I went to wake him for school. He wasn't in his bed. I found him in his brother's bed. He was up against the wall which meant he had to climb over Tate to get there. When I woke him and mentioned that he was not sleeping in his bed he started complaining about his brother kicking and elbowing him. So, why didn't he get back in his own bed? He's seven years old, he's a boy and since boys grow into men I'll probably never know why!