I'm on my fourth and fifth kid, and I found that boys have a lot of trouble talking to parents or expressing themselves and even girls shut down when they get to be preteens (not all, but I'd say most). It's normal for my easy child to grunt at me when I ask her a question and when she says, "I'm bored" (which I LOVE...lol) she won't tell me what she'd like to do. Usually she knows exactly what she wants to do, but won't tell me until I guess right. It's very maddening. If you have a sixteen year old boy I'd be surprised if he told you too much. Maybe in spurts, when something is important to him, but teens tend to shut down a lot or share with their friends. Course not all teens are the same, but lots are. I don't think it's just your son by a longshot, although not all teens act out or get aggressive, even when they shut down.
