Ciel will have no idea what all the luxury fuss is about, this is like, his daily life. 8) Joking aside, with inhibitions being lowered, he may exhibit random childish displays (more prone to playing games, general trolling, acting like a precious child to play with your expectations). Otherwise, he'll be learning about herbs and drugs from the resident expert himself (Sebastian).
When inhibitions are lowered, other people have sex; Levi cleans. He'll also be picking truckloads of leaves and flowers to be used in steeping tea. I need someone to give him the idea of opening a tea shop/tea house, so if anyone would like to volunteer for the pep talk of "follow your old dreams! you can do whatever you want here!" that would be awesome!