Why Oh Y oh Y? Day 1

Why is that he feels like he can come home, walk into the living room where we are already watching television, and just change the channel to something that he wants to watch? Like football. Even when he doesn't really like football, or hardly ever watch it, but he wants to pretend to the guys in the office that he follows it. And even though we have 4 other televisions in the house. Of course the one we're watching is the best one. Is it the Y chromosome that makes him think he has this right?