[it's a lot of things. it's the pure feeling of it, yes, the further scrape of teeth or the dip of tongue into certain places or the simple exquisite tightness of Wei Wuxian's mouth when he sucks. but it's also just Wei Wuxian -- every time he pushes his limit in an effort to undo Lan Wangji, every clever learning shift of his mouth or hands or the wicked expression on his face. "it can only be you" -- a strange and complicated sentiment now, with two versions of him here, but true all the same.

he's still holding himself back, holding himself steady, able to do so almost inhumanly long, but as time stretches on Wei Wuxian can see the tremble of his lashes and feel the increasingly uncontrolled tug of his fingers against his scalp; getting close again.]