They should. They really should. But then Xichen is kissing him again and Jiang Cheng holds onto his waist, hauling Xichen bodily against him so that he could kiss him more passionately and so that Xichen could claim his mouth as well. His arms wind around him and Jiang Cheng moans against his lips, welcoming the claim and all that Xichen is. It feels too good, he tastes too good. He can't just let Xichen go and just stop.