Oh, that was an amusing response, to be sure. Kimblee hasn't really explored this sort of thing with others - the women he'd been with had generally all been of the opinion that pain was a negative thing to be avoided; it wasn't unheard of for him to injure them accidentally in bed (or..."accidentally", as the case may have been a few times), but it was almost always something that ended in a lot of insincere apologies and more than likely getting slapped. However, Isaac wasn't just tolerating it, he seemed to be asking for it.

Far be it from Kimblee to deprive him, really. "Of course."

Isaac's hair is more than long enough to allow him to wrap it around his fingers twice, granting a firmer grip and a bit more leverage when he closed his hand around it; the tugging back starts slowly this time, giving him a few moments to adjust to the tight pulling at the back of his scalp before he jerks back hard, the motion quick before he releases the tension entirely there, though he still keeps Isaac's hair twisted tightly around his hand.