"Humans don't do... this... though." Xavin poked again at his hand, satisfied for the moment that her point was made. Perhaps Peter could do it? He climbed walls and ceilings, which implied he could stick to things. Certainly that was how the Spider-Man in Xavin's home universe worked.

If he then stuck to something, and could not un-stick, how would that work? She frowned slightly, then abandoned his hand and started making a drink instead, on the theory that a distraction might allow his hand to be removed while he wasn't paying attention. "Do not move."