It should feel weird. It should have Stiles drawing back and being all 'eww' about it, but it looked so little like Derek, other than the coloring, it was hard to actually think of it as Derek licking him. He smiled, hand still petting him as his other one scrubbed over his face. He'd been pouring over those books for a while before Derek had showed up and his brain was fried. Stifling a yawn, he looked at Derek. "Maybe I should take a little nap. Just a little one. Deaton will probably want us to go somewhere."