Walking past the local fish and chip shop on the way home from school the other day, I mentioned that next time we have chippy for tea, i'm going to ask for, chips and fish, with vinegar and salt. DS was not happy! (He's 6 btw) He said I can't, that it's not right! I am not allowed by him to ask for chips and fish in that order.
So when did it become not right?
WIBU to ask for chips and fish and not fish and chips?
Why are certain things said this way round anyway?
Cheese and onion?
Ant and Dec?
Salt and pepper?
Why do they sound so uncomfortable said the other way round? 
So, AIBU? 