When the teenager's voice begins to change, a major part of his self concept is threatened.
Whereas we see little of our body parts unless you carry a full length mirror around, as I do. But we do constantly hear our voice. It is almost symbolic of our daily existence and who we are. If we lose our voice, we have almost lost ourselves!
Now we can begin to see the potentially massive psychological problem that is confronting the young teenage boy as his vocal folds begin to rapidly increase in mass.
His voice begins to drop in pitch. His "Comparitor" sends error messages to the Mixer that the pitch is not right. The Mixer sends messages to the larynx to raise the pitch.
But this is becoming more difficult as the mass of the folds continually increases.
There will be frequent sudden pitch breaks. The resulting deep voice is an aberration -- not part of the teenagers concept of himself. What's more people may laugh.