One of the most successful monogomous couple in the entertainment industry is Beyonce and Jay-Z. Why? Because Beyonce is faithful; why can't white couples achieve the same level of success? Brad and Angelina, Tom Cruise or Johnny Depp with any female? Because white women are the most unfaithful race on the planet. They will cheat before the man has a chance to have a fling, and then realize she is the woman he wants to spend the rest of his life with and never cheat again. Not only that, but they would either cheat after being cheated on (never do this) or create hostiliy and destruction in the relationship.
Sometimes the man needs to get a wake up call and realize he only wants this one woman, but if the woman isn't strong enough to stay faithful and take pride in knowing she's the wanted one, the relationship dies.