DEAR MISS MANNERS: If I bring a food item that I prepared, and it turns out that someone else brought a similar item, is it impolite for the host to say, “You shouldn’t have brought this. I already have some”? Related Articles Advice | Miss Manners: Must I step aside for a customer who is finally ready? Advice | Miss Manners: The plumber billed me for time he was on a personal phone call Advice | Miss Manners: My sister doesn’t work.