It makes sense that this is out of his comfort zone. He thinks back to Cinna saying that John has no idea how good he looks. He imagines it's hard for him to find the confidence to show himself off like this. Finnick's not sure if something or someone in John's past made him feel ashamed of his body, or if he's just not naturally very confident, but either way, it's nice that he's pushing himself to do something like this. Finnick will treat it with the care and sensitivity he needs and deserves.

"I think you do, too," he murmurs slyly with another look to John's erection.

Then something happens- Finnick isn't quite sure what, but John reacts.

"Found something that feels good? Try doing it again," he encourages gently.