*generally assumed to be impolite to compliment someone's clothes at an event where they were expected to dress up; implies that you are suprised that they managed it/gives you no room to not comment on someone's less than awesome choices. Also, gender rules. Also also, Quatre is familiar with this social tradition (as it's still fairly common on earth/other colonies(?)), it's just not his default.
*you assume someone with an assistant has an assistant of their same gender.
*you assume someone with an assistant has an assistant of their same gender.