Astarion's mouth and tongue are - not cold, but he's definitely cooler than the average humanoid; still, the warmth of Angel's skin warms him up quickly. He quickly finds a rhythm, the slick seal of his lips stroking his shaft as he bobs his head. Listening to him moan, hearing something there more genuine and less performative, makes him shiver in vicarious arousal.

He hums deliberately, pulling up so he can lavish attention on the tip of his erection.