there was so little sign , no weapons , no fallen gear , or any evidence of a human presence . his face twisted up like he were bare keeping something in behind it . he restrained himself ; now was when he would make his move . on that day they 'd fought over a rock-runner that they both wanted to capture . `` do you wish me to change ? '' `` we have not yet begun your instruction on sex . '' `` as long as you do n't hurt my face , i suppose . '' 