Finnick was used to rushed emotions. He never really had time to take things slow after his games. Everything past by so quickly, and he liked it that way because of how all the Capitol people did what they did to him. Turning him into an object made Finnick numb.
Up until these days after the freaking revolution succeeded and now everything was fine. His time slowed down, but the same pain lingered. And then comes this spark, warm and cozy and it’s all Finnick was looking for. But it’s still slow at reacting, because coming from Katniss makes it kind of unbelievable. But then she continues, and he feels her hands in his body, and multiple sensations run down his spine, and he feels himself wrapping his left arm on his waist, and his right hand reaching the back of her neck to pull her even deeper into his lips. Tongue, knowing but shy, ask for pass, just exploring and his hand goes up and down her waist. The bliss is as hot as the fire burning in their souls.