Oh, that smile, Zach had seen it before, on other people. No doubts then. And that made him just grin more easily and larger. And he felt perfectly comfortable checking Fred out a bit more. Somehow, it hadn't felt fair to appreciate his looks when he may not have been aware. But he was.
An eyebrow shot up at the comment about natural. One hand came up, twirling one piece of his hair around a finger. He let it go. "You can test it by hand if you want," he offered with a small smirk, "Unless you have a better idea." His eyes didn't shy away from Fred's, as he wondered if Fred would suggest something else. Something...else.