[swallows as much of it as he can before he's forced to pull back, coughing and gulping in a lungful of air. but he doesn't leave a mess--any spend that he doesn't catch in his mouth he laps up with a greedy tongue, sucking at the tip and giving Lan Wangji's cock additional attention with his hands until it's soft. when he looks up at Lan Wangji again its with satisfied eyes, swollen lips, flushed cheeks, and a bit of a mess on his face]

How was that?