"Gooooood boy," Finnick murmurs, rubbing John's back, glad to feel him relaxed and not too nervous. The sounds, the clutching- it's such a turn-on to introduce John to a new sensation and feel his reactions. His own cock is still leaking onto his stomach with the deliciousness of this, the sense of anticipation, but he doesn't lose focus on his task for even a moment, pouring all his attention over John's movements and sounds.

As there's no hint of pain or reticence that he can tell, he continues, working his finger inside to the middle knuckle, twisting it gently to press on and smooth out the sphincter.

"So good for me... Another deep breath, love," he whispers, pulling out enough to add the tip of a second finger.