Characters show off teeth that look wrong in a deliberate, stylized way, like sharp fangs, jagged shark rows, extra sets, metal grills, or monstrous mouths that don’t match a normal human face. It usually gets framed as a creepy or feral vibe, and it can turn intimate scenes into something more dangerous-looking, especially when a mouth is right up on someone’s skin or dick. Artists tend to linger on close-ups, open-mouth grins, and the contrast between pretty faces and unsettling bites.