Cooper's fingers tighten for a moment. That's going to leave some bruises. He laughs, a short sound with little real humor in it. "No fear. I was that way once. Better learn this lesson quick, boy." He leans in towards Stiles, close enough that the teen can feel his breath on his face. His fangs come out. "A little fear is good if you want t'survive instead of endin' up dead."

He makes a move as if to bite Stiles. While his teeth do close in around the teen's neck, he doesn't puncture the skin. Tempting as it is, he's not going to push this to the next level. Cooper pulls back and lets go.