Scott- that spot just below the shell of his ear drives him mad. You use this to your advantage.
Stiles- lips. They taste so good. You can't help but want to always have lip-to-lip contact with this boy.
Derek- jaw. He has a jawline for days. Whenever he's angry, a kiss or two there will always help to calm him down, and bring his focus back to you.
Jackson- His temple. Regardless of what a douche your boyfriend can be, he never rejects a kiss here. It's as if he can't resist it.
Isaac- cheek. It's cute in selfies and makes the wolf blush. Plus, it usually leads him to pull you into his lap, and kiss him much harder in many other places 😉