Stopping seemed terribly as he gripped the other man, the other's panic unknown to him as he kept his eyes closed and muttered something that sounded like Oh God but might have been a million other things as he raised his hips and bit at Sirius's lower lips carefully. He didn't know if he could turn Sirius while still in human form, and that wasn't a question he'd been able to ask anyone before. But a gently nip was easy enough as he kept rubbing the other man the way that he sometimes rubbed himself. "Sirius," he moaned low, raising his own hips as he pressed a kiss to the other's ear. "Please... I want to make you feel better. Tell me how," he asked, as if he were asking a teacher to show him how to perform a charm properly and watched the other man for signs of approval.