"'Boss' will do, thank you," because 'sir' makes him feel old and he will fight that feeling even when he's plagued by wrinkles and peppered with grey hair.

The fact that he makeshift leash is doing it's job more than pleases the mage and he takes a few steps to gauge how well the man can keep up that attention. There's not much slack on the scarf, but Dorian is prepared to hold it high and taut should the submissive's gaze stray.