Tidus turns his head, coming directly into this face in his. The smooth delivery of Inigo's question, the second it takes Tidus to realise what Inigo is referring to.

There's better ways to react to this. There's ways to react that are reasonable, seasonable, logical. Then there's times where you react and you're not quite sure why you reacted like that, except you did, and now you have to live with that.

The reaction that Tidus goes for is that latter - and that latter is this: