[He can't help but stare a little - Nathaniel has seen a fair amount of alien species in his time, but he's been surrounded by humans for so long that someone Clearly Not That grabs his attention - but he's glad the paintings distract them both so that the man won't consider him rude for it. Well, then.]

[He smiles, tilting his head in return.]

Looks like they just want a bit of flirting. Maybe a little more. Kind of an easy game to win, right? No losers, as far as I can see.