"As I live and breathe." He walked around Sherlock, taking in every part of him, like he was a specimen in a museum. "I've never actually seen a Vampire." He said. There was no malice or anger in his voice. He was not upset at there being a Vampire in his presence, like most Demons would be. He was... fascinated.
And then he turned to John, who because of changing into his Demon form before, had no shirt on. Martha, of course, had specialty clothing that fit both forms, so she still maintained her dignity, despite being a demon.

"Turn back into a demon this instant! I hate seeing that... human form of yours." She snapped in a low voice at John.

The healer took a few herbs and sprinkled them on John, causing a cooling almost numbing feeling. "That will help with pain and nausea that you have been feeling, at least for a few days until it wears off." It smelt of ginger and peppermint. "The ginger and peppermint are natural herbs to help nausea. I suggest you seek them out once this wears off."