[he manages not to choke, if only just--he was prepared for a reaction like that, which was the entire reason he tried it in the first place. waits for Lan Wangji to settle, breathing through his nose and brushing his fingers across his thighs in a repetitive soothing motion. when he's confident he won't gag he begins to move, eyes finally flicking up to watch Lan Wangji as he does so]