Jim was not the tap out type. He'd been tortured by the best before and even they couldn't get him to crack. And in the case of asking for it, he truly won't ask Sherr to stop. Not when he can feel himself teetering so nicely.
It was also a wonderful view of the other. Sherrinford's thoughtfulness of it all, his delicacy. Jim's fell open again and he fidgeted more, legs squirming. It was only natural instinct kicking in that was saying 'hey danger' but Jim didn't want to listen. He gives an odd pair of a moan before a squeak at this.