When Robin laid on top of him, Peter shifted his arms so that he could cradle the back of her head with one while the other took a possessive grip around her waist. Although he wasn't in the dominant position at all, she was just as much his now that he was hers and he would be loathe to let Robin go at all. Every little piece of positive reinforcement did wonders to buoy him.

He hummed inaudibly at the hand teasing along his neck. He did, he really did like it when she focused on his neck. Never before had he realized just what an amazing spot it was on himself. It only furthered his appreciation for Robin that she had drawn it out so effortlessly, found something about him that he hadn't even considered. "Mm, yes," he hummed, head tilting back to give her better access once again.