God, Stiles could write volumes filled with the things he doesn't understand about Derek Hale. First he comes in looking like he lived in the woods for a week, then he grills him about Lydia - who Derek doesn't like anyway - and then he's getting all quiet and nice again like he has been since they got here, bumping foreheads like pack and giving him these looks that make no sense in context of Derek Hale.

Annnnd then he's getting naked, and Stiles really has no clue what to do with that. He gapes for one moment because he's Stiles, another because he's sixteen, and another because it's Derek's ass. So three moments later, he's bright red and doing an about face, heading into the kitchen to definitely not think about what the fuck just happened.

He makes them both sandwiches, Derek's piled high with slices of steak, and turns on the TV for something to stare at while he waits for him and doesn't think about the guy he's kind of got a thing for getting buckass nude in front of him.