[ Her mouth is open and pliant around him, and Hei stifles a low noise, hips stirring under her -- not pushy, but with a fractured sort of patience, like a horse at a starting gate. His breath is heavy with the rapid rise and fall of his chest, whole body throbbing with restraint, but his gaze stays steady and calm. When she starts to sink wholly down on him -- not sudden but easing into it -- his response comes as a choked, startled cry. He's not very vocal in any context, but this. This. ]

Korra-- Shit.

[ His fingers knot tighter in her hair, and for a moment his eyes slip shut. It's an effort not to jerk up into her mouth, or to accidentally hurt her; she is so very new at this, all zest and a minimal of skill, but perhaps just as heady a combination as jaded experience could ever be. Flexing his fingers across her scalp, he breathes out, ] Try to -- draw the air from -- the sides of your mouth as you come up. And breathe out through -- [ fuck fuck fuck ] -- your nose as you go down. [ He hopes she won't ask him how he knows this particular trick. (It's what he uses when he wants to hide tubular objects in his throat to evade surveillance.) ]