What was it about that particular shirt that made Fred want to jump all over her? The emerald green lace, that had to be it, and the way it fit just perfect in just the right spot.
Ron didn't even care, he didn't even look. She had worn it just to try and get him to pay five minutes of attention to her.
Now Ron was missing out. He could feel her heart pounding as he kissed her. She was breathing heavily and Fred decided her didn't really like that shirt any more as he pulled it over her head and tossed it aside.
She looked much better without it.