Well, he had brought other clothes, because injuries are messy and he anticipated getting them dirty, but they're not suitable for sleeping. They've also spent time naked in a hot spring together, has napped against Finnick on the beach in plain view of everyone. It's not all that much of a stretch.

This time, Levi arranges himself so Finnick can rest against him, if it's comfortable. He doesn't even blink or comment at the request, but carefully feels for the button and twists to find a safe spot to carefully lay the arm.

As they finally settle, fingers find their way into those blonde curls again, idly combing through.