If it weren't for the question before, Tidus might be clued on to the innuendo there, but as it is, Tidus's brow furrows, trying to get what that could mean in particular. Though, when it comes to dancing...

"Uh... I don't know anything about dancing?" he unhelpfully offers. "But I wouldn't call anything a surprise... I just like getting him to dance with people! Even if it's me. Get him out of his shell more - he's pretty shy about it."

Which leads him to ask, after a beat; sincere and thoughtful. "Even if you know how to dance, if you have the time, I mean... it'd be cool, if you could dance with him sometime? If you wanna."