So if the princess picks the right card, she says something the NPC will like, and if she picks the wrong card, she just says a generic "wrong thing," instead of something related to which incorrect card she picked? If that's the case, and if there are no NPCs that want the lustful cards, why do they even exist? It seems there is 0 reason to take them, even from a roleplaying perspective, because she'll never actually say anything lusty from picking one of those cards.