They're both joined in this very uncomfortable thought, one where Tidus can't immediately attempt to fill in the silence. It's a thought that's going to come back and haunt him, even if for the meantime...

"Er... I'm sure the people with pets know what they do. They've talked about it with other people!" Surely. Right? Right? "I just don't know 'cause I don't have any!"

He waves a hand.

"I'm sure it's fine."

Said in that very 'It's fiiiine, nothing to worry abouuttt' manner. There's got to be a system around!