Ash wasn't the only one who was surprised. Rook himself was as well. But then he hadn't been prepared for this reaction to watching Ash rub his feathers across his skin so why should he be anymore prepared for his reaction to kissing Ash.
They probably really should stop Rook figured but at the same time it couldn't hurt to kiss Ash a little longer could it? Not when Rook couldn't get enough of the taste of him and enjoyed the way Ash felt up against him. "Do you want to," he finally managed at one point.