"Yeah?" There is absolutely nothing to question here: they both enjoy this immensely, but John feels the need to anyway, even as he decides that he's had enough of Q not being completely naked because he has plans, plans that don't involve boxers but do involve his mouth.
The hair tugging can stay, and shit, the scratching can too. He likes this part, the pleasure and burn at the same time, like a proper drink or a cigarette.