My parents were happily and faithfully married for 67 years and they did not look alike, even in old age. Mom looked stereotypically Polish and Dad’s face was, as they say, “the map of Ireland.”
People are naturally attracted to others of similar background in most cases, despite what the woke nutjobs would have you believe. There ARE a few exceptions where the couples have a fruitful and successful married life, but it’s the exception that proves the rule. I know of two white men, brothers, married to black women, but in both cases, they were raised in the same religion and type of family and community structure. The men are Beachy Amish from the US who both found wives from a church-planting missionary mission in Haiti. No, the wives are not sisters! They live in the US, are in farming and logging. Both have large families, 11 and 9 children, last I heard. Too bad they aren’t Catholic!