"No wonder what?"

"I just get this feeling that when he looks at her, he's somehow changed," Bart mused, scratching his head thoughtfully.

Maggie stared at him intently, her interest piqued.

“What's the difference?"

“I'm not sure. ALL I know is that he's not the same," Bart replied, his inexperience in matters of the heart making it difficult for him to articulate his feelings.