"In other words, you really like pink," he replies with a smirk. "I guess I can deal with that," he adds with a playful and feigned resignation. Lucy offers him a drink and Derek gives a little shrug "Water's fine, thank you."

He normally wouldn't take the offer except that he wants to take the opportunity while she's headed off to get it to actually scent his surroundings. That's how Derek gets familiarized with a location. Humans look around, observe with their eyes. Derek observes with his nose. It just probably would look a little funny for him to be sniffing the air deliberately if she happened to catch him doing it.

Hearing her starting to return, Derek ends his effort, satisfied with the scent of Lucy pretty thoroughly permeated in the space — there are scents of a couple of others, one more strong than the others, but he figures those belong to her friends or family members — and he smiles back at her. "This is nice." He's already said that, but it merits mentioning again. He's living in a hotel room, after all, and before that an empty loft, and before that an abandoned train depot, and before that, the burned out shell of his old family home. "It's homey. I like it."