Thanks.HOLY GOD! Your post was like a brick to the head for me!! I never thought of that and it makes awesome sense!! Dude, you deserve a Naruto medal or something (Y) :headband:
This might sound funny. If Kakashi does have fangs, couldn't he catch the nail between his fangs. lol
Or there is something that we still don't know about him. Or it was Kishimoto's initial intention to have Kakashi with fangs but Kishi changed his mind along the way?