Stiles smiled, happy that his plan was going so well even if he was going to look like he had hives or something on his neck thanks to Derek's stubble. He shifted and accidentally-on-purpose hooked a leg around Derek's waist because it was the international sign of TAKE ME, DEREK.

"That vampire touched me too." Or Stiles had touched him, rather. And probably had his ab glitter on his hands still. Glitter never went away.