now i don't take atnotomy myself, i go off simple memory and ideas. sense vampires have fangs, they would be something to keep them from puncturing themselves. a pouch that goes not only within the gums, but with also the bottom of the mouth. this way, they don't constantly hurt them selves. and i made it to where every vampire has a different thickness and length in fangs. some will have short fangs, some will have long fangs, but there will also be a difference in thickness as well. sorta like a fingerprint!