[Bucky considers the question for a few seconds, not really sure how to explain it.]

I can, but... [He crinkles his nose a little, or as best he can, really, while he's like this.] It's different from what I'm used to. I don't usually identify people based on how they smell, you know? I could probably tell someone I'm familiar with - like you or Steve or [lol :c] Natasha, I guess - but I couldn't tell you what Rhade smells like.