I think primarily made for BBC, and by made I mean trained and developed.
My wife 10 year ago was reasonable tight(pre fam) and pretty innocent, we never watched porn or really even talked dirty. She was very shy about nudity and modestly dressed especially in public.
Anyway after a chance view of a BBC on a beach(guy was getting changed on the public beach as they do in Greece) she became slowly obssed with size, we went through a rapid change of dirty talking to watching porn, to her flashing on beach, to her first extra marital cock (white). To eventually BBC and beyond.
So the reason say made, even by chance encounter. Is 10 years ago, if anyone would have said my sweet innocent right holes no anal wife would in 10 years be getting dropped off at my mates every month or so for a party weekend if 3 to 4 guys fucking every hole, to BBC, dirty talking, porn watching , bringing me home my first cream pie from her ass, mocking my small cock, wearing outrageous bikinis on the beach and basically a free pass to most BBC or big cock to slam her holes, to even look at her ass now, it never goes back to normal.
I would not have believed you, so some woman you can look at and say "built for BBC", but I think any woman given the time and training can be made into a BBC dirty party slut like my wife