Dennis nodded at the other man's thanks, recognising that they were genuine - even if they were a little terse. Besides, it was excellent advice. Apothecaries that at least nominally managed to reduce their smell had always seemed to get better custom, if purely because people would allow themselves to spend more time there.
He quirked his eyebrows at the shifty way that Draco looked at him and then away again several times. "Obviously while he was a prat, my ex didn't actually shave my head," he supplied helpfully, vastly amused by the entire situation.
Dennis smiled as the man moved towards him slightly, showing a greater openness to conversation - or possibly a willingness to hex him. Either way, Dennis was happy to keep talking. "No actually, it's a book by a Muggle author called Anne Rice," he said with a chuckle. "The vampires in it are... Very different from actual real-life vampires. More sexy and alluring and pale for a start..." He trailed off, aware that he'd accidentally flirted with Draco, which was something he hadn't intended. "I'd be delighted to write your biography of course," Dennis said with a florid bow. "But we might have to wait a few years, let some juicy facts develop eh?"