Scott- when you concentrate really hard in something. You usually dart your tongue out across your lips, or hum.
Stiles- when you bend over a surface right in front of him, and you don't even realise what your doing. He usually can't help but to slap dat ass, and we'll, things ensue 👌👈
Derek- when you stand up to him, or anyone for that matter. He usually growls and rakes you on the spot, just how you like it.
Jackson- When you send him sexts or nudes, during school, or when he's in public. The idea of you being so risqué sends him over the edge.
Isaac- watching tour oral fixation. You seem to always be putting something in your mouth absent-mindedly. Whether it be a pen, your thumb, or food. He tries to ignore it, but he can't help but get turned on.