What's wrong with Justin Beiber?

I'm not talking about his shitty music. A lot of people have shitty music and he isn't any worse than other terrible music. I really just don't understand how he is supposed to be like 17 and looks like he doesn't have one pubic hair. He doesn't seem nearly as developed as a healthy teenage boy should be. Does anyone else think he may not be as old as people say he is in order to appeal more to tweens? Or maybe he is being fed growth suppressing medicines so he can ride the tween train longer. I will accept even the most ridiculous theories.