Prestidigation-based artificial flavor is very tastably artificial, as the cantrip warned, but it's still better flavor than dath ilan can manage in the absence of magic. He makes a mental note to tell her about this scored point for Golarion later; he's not going to cheat on recordkeeping, but right now he has other things on his mind.
"If you want to lubricate yourself before my fingers go in, now's the time," he warns her, some distant part of himself noting how much that also isn't being phrased as a request.