What point is there in testing the distance if there is no scent to detect?

[Don't question his devotion to science, Alucard! Hector is already nervous distracted awkward as it is.

He raises his hand and offers it, wrist turned upward, for Alucard.]

I feel like one of the ladies of the court, with perfume dabbed on my pulse points.

[He watches Alucard's face for a reaction.]