'Muddying' the water even more, I would remind those sincerely involved in this conversation that since 'African American' is largely a catch-all phrase, there are different cultures within the "Black race".

For example,I know African Americans couples in which one half of the couple is from continental Africa, and one is from the USA. I also know African Americans who have one African American birth parent {meaning a Black American born in the USA} and one birth parent who is non-African American [Anglo born in this country; German born in Germany; Native American; Filipino; Japanese]. I also know African Americans who have one or both birth parents who are of Cuban and other Caribbean descents. There are also African Americans who have two birth parents from South America, Latin America, and elsewhere.

And as hilda fish indicated, given this generic definition of who is or is not 'Black' in the USA, indigenous people from Australia would also be considered Black...

Not to mention that-irregardless of the use of such referents as 'biracial' and 'multi-racial'- in the USA the offspring of the cultural unions that I mentioned [and others] would be considered African American. Also counted in this mix are thousands of people of some 'African descent' who are adopted cross-racially and, sometimes, raised without any real, direct knowledge of 'African American' culture[s].

To add to the already complex mix,there are African Americans who are raised in non-traditional {for most African Americans} religions such as Judism, Islam {including Sunni Muslim;"Black Muslim' and "Moorish American"} and various traditional African religions such as orisha vodu...When an African American who was not raised in any of those faiths marries a person who is, this would also constitute a cross-cultural marriage.

I have not had any personal experience in cross racial/cross-cultural marriages other than as a family member or friend of those who directly entered into or were raised in those unions. But based on my observations, it seems to me that the persons involved should both strive to learn and understand as much as they possible can about the cultural {history, values, traditions}. And for that relationship to succeed, each person must to try to rid themselves of any traces of the racism that they probably have given the nature of this world..

As others have mentioned communication and humor can help any couple weather the storms which are bound to occur in any close relationship. Of course, it helps to have a solid, strong love, respect for the other's personhood and 'space', as well as some shared interests.

I would also add that 'geographical location' is an important factor, especially if these two people are raising or planning to raise children. Having worked for many years with families who adopted international and tranracially {from the USA}, being 'the only' 'different' child or only one of very few children who are racially different can be very difficult for a child-even when the community acts {or actually accepts that child] in a color-blind way...Why? because it doesn't prepare the person for life in this racist world.

That being said, if phsial and/or emotional abuse is not a factor of their relationship, sometimes couples have to ride out the storm, with the knowledge that there are up & down cycles in any relationship. Even if a couple have 'true love' that is beyond cultural barriers, they are not immune to natural conditions that occur in/with any relationship.

Paraphrasing a comment made recently, "Relationships are hard work".
Hope this helps!

Ms. Azizi