Greg's tongue dipped down there and Theo bucked a little with a strange sound pulled from his throat, a noise he hadn't made since the first time Greg had done this to him, a virgin to his own body once again.
He breathed quick and shallow like something small and terrified, moaning like a slow leak, pliable under Greg's hands as he did indeed curl up and spread himself out in response to Greg's questioning pushes. He stopped breathing entirely as Greg's tongue fluttered against that most intimate, vulnerable part of him but then it was trying to push in and Theo's pleasure slipped, a little spike of fear pushing out amidst it like a shark fin in the sea - "No." he said, small, sharp, bitten off because he didn't know what was happening to him anymore.