Hermione takes his hand and he lets her, sighing. She's not the first person to stare at his fingertips today, and he's sure she's not going to find anything. ...pretty sure. He watches her examine him with some level of apprehension, visibly relaxing when she doesn't seem to find anything unusual as she talks.

"Nothing bit me! No radioactive spiders, no exposure to gamma rays, no..." Invitations to Hogwarts. "Nothing exciting. I just woke up sticking to everything, and now I can climb walls and it's awesome!" She's actually looking with a magnifying glass. This would be hilarious if it didn't actually make him mildly concerned. "See anything other than my freakishly long fingers?"