"Chemosignals," Derek clarifies, "though pheromones do play a part. Especially when it comes to arousal. Which I can also smell."

He huffs out a slightly bitter laugh at Barry's comment, raising his brows for a moment. "Yeah, me too. Definitely."

It's a bit of a relief to learn that Barry heals fast, that he's safer than the average person. He reaches out to lightly poke Barry's slim hip. "That's good, though. Regular humans are so squishy. Glad you're more durable."