[stays still for him, so still, hands on his hips to steady himself just as much as Lan Wangji. the second time still doesn't prepare him for how amazing it feels to be slowly enveloped in the wet heat of him; if he looks he might come undone, so he keeps his eyes on Lan Wangji's face, lets his chest swell with an emotion he can't put into words]

Tell me--tell me how it feels.