I enjoy this question!
In the case of my wife ... she probably would have. When we met, all she really knew was white guys. We have built an amazing marriage and have fallen deeply in love, have children, etc ... but if we hadn't made the connection or should I die or something ... she would likely only date black men, and she would likely re-marry black (we have had this discussion). She might even consider if that were to happen, having a black baby.
In our case -we have a very close friendship and partnership that's open and loving. She's would not sacrifice that for anything, but if it were to evaporate or be taken from her for any reason, then that may change things. She has boyfriends where they get to make the friend connection and have fun sex too, so from her perspective - right now she's got the best of both worlds!