It's sweet. Inigo has only just met the other guy, and he's obviously not having the easiest time with having found himself here only just now, but.. Dennis is still sweet enough to go out of his way to do something fun with Inigo, perhaps having picked up on his awkwardness slightly.

It makes Inigo unable to not smile back at him. His cheeks may even be colouring faintly pink, because he appreciates that kind of natural kindness in others so much.

"Thanks." It sounds genuine. Perhaps a bit too much so, since his tone seems to take on a more joking edge a moment later, as if to compensate for it. "Don't call yourself rubbish though, what am I supposed to be compared to that, huh? Dirt?"