Finnick feels that sense of dignity, of respect, whether he has the words for it or not. It's something Finnick practices as well; in times when his appearance is under his own control, getting clean and being well-groomed is a point of pride for him, and a way to feel like he owns his body himself.

He smiles as Levi kisses his palm, a small and sheepish smile that's quite different from his usual confident grin, his blue eyes flashing at Levi's for a brief moment. He watches as Levi diligently wrings the cloth, twice or thrice as much as Finnick would think to, and that small smile stays put.

As Levi washes his back with the warm cloth, Finnick's eyes slip shut, his posture slouching forward in relaxation. His metal hand gently grips Levi's thigh to keep himself upright as he otherwise loses himself in the feeling. He hums softly, feeling sleepy. Feeling safe is rare, even with another person- after all, he was always taught he could truly trust no one, as even your closest allies will turn on you in the arena if it means their survival. But Levi is one of the most steadfast and trustworthy people he knows. It isn't hard to feel safe with him, even after a dragon-chomping.