It is polite to follow simple rule of etiquette.
Lisa was attending a fancy dinner that was hosted by her workplace.
Lisa wants to eat.
Lisa chooses the correct fork to eat eat course of her dinner with.
Lisa eats the spaghetti on her plate using nothing but her fingers.
Lisa's bosses are impressed with her table manners at the dinner.
Lisa's bosses have a talk with her the next day at work about her manners in public.