i 'd only ever traded one object for another . she remembered a dog had caught her attention and caused her to look foolish . plus she knew that he underestimated his own intelligence , and she wanted him to appreciate and understand that he was a very bright guy . one brave told me that they tickle a bit , gnawing , but it does n't hurt at all . '' she could n't contain her smile as she lifted the huge dog bone from the soft velvet fabric it had been sitting in . 