There are some people Inigo definitely wouldn't take being called sensitive by, no matter how true it is. But from Della he seems to easily accept it - even when it's followed by that cheek-pat. After all, she's both saying she likes him and that Tidus shouldn't tease him. She could say just about anything after that and he'd be okay with it.

"Why can't we just be equally good sons? I can have the cuddliness, and you can have the... the sportiness!" Baby Spice and Sporty Spice.

There's still a hint of poutiness in his voice as he says that. Why does everything have to be a competition, bro? "Besides, are you implying Della would want to see us fight? She's way too nice for that!"