The tickle of the word being spoken across his skin made Zelnick shiver, the feeling far too intense for something so close to imperceptible, but he couldn't resist a wry chuckle and murmured, "Glad you noticed." Huh, but ZEX saying the pet name (would that be the right word? He certainly tended to use it as one, even if it was technically Zelnick's species) meant that he had stopped the kissing, which felt even better, so he should obviously start it again, yeah?

Zelnick nuzzled his hair again, and stroked his back some more, and curled his other arm around his waist, encouraging him to go back to doing things that felt very very good.