The less gentle she is with him the more he can feel himself getting worked up. He doesn't mean to pull her hair but the more she pushes his legs apart and touches him with her tongue and fingers the more he tightens his grip. It's only after a moment he realizes what he's doing and lets his fingers gently smooth down the sides of her head to rest on her shoulders, as if placing his palms there will help keep him upright. It's not that effective, for he finds himself leaning over more and more, shivering despite the fact he's far too hot for his own good.

He's felt this way before when A2 had pierced his shoulder with a metal pole, when she'd bit and hurt him in the process of trying to find release for the pent up feeling of this...whatever 'this' was. It runs deeper than just arousal. Hell, 9S isn't really sure he can even call it that. All he knows is that he's losing his grip (metaphorically this time). It's surprising too that it feels so good to be touched down there when there's not really anything to touch. He'd pat himself on the back for a job well done when it comes to the changes he'd made, but he's too busy panting, venting little bursts of hot air from between his lips as 2B makes him tremble.

He's not sure where it'll end. Feeling something is one thing, but finding release is another beast in of itself that he hasn't entirely figured out yet. 2B, he presumes, was able to feel that relief. For 9S that relief came with a literal reboot. Hopefully he can keep his temperature under control but by the looks of it that's becoming increasingly difficult.