Oh, it's no surprise to him. Swann has already casually thrown around the word pirate enough times like it was nothing, and the cheerful way she continued to talk about it cemented, to him, how little it must mean here.

Couple that all with the fact that he's slated to most likely die anyways in this stupid Arena of theirs, what was the harm. Particularly because Jack liked to talk about himself and tell his stories. And particularly because these Capitolites probably weren't expecting to hear the more unsavory, raunchy, and gory bits to a pirate's daily life.

"As it would be. I wouldn't mind doing it, luv."