He leans a little closer towards Tidus no homo, looking obviously confused, yet at the same time like he wants to keep said confusion on the downlow. You know, in case someone is watching them and sees Inigo looking so terribly uncool!

"Is.. buying chocolate a mandatory kind of thing?"

Listen, he's just not used to all these modern things yet.. Is this some modern ritual Tidus is about to enlighten him about? The Ritual of Buying Chocolate?