Nie Huaisang asks Jiang Cheng to plug him up after sex so he can be filled with Jiang Cheng's cum while presiding over a discussion conference. Halfway through the day, Jiang Cheng thinks he should check if Huaisang needs a refill.
And this is the thing: Kuan-hung's not busy, and he's sure enough to think that they both know it without his saying so. But he gives a little rolling shrug of his shoulders, anyway, with his limited range of motion, and answers, "I'm not," because he can. And, "Can't you take care of yourself?"