Love it, but in reality, few couples disclose their true fantasies--especially if it borders on her being demeaned because of the skin color of the guy.
I found an interesting news on an Italian site that I translated with google translate:
What are the reasons for cuckoldism?
The hypotheses can be many:
the fact that it is often the man who decides the place, the moment and the person with whom the wife will have sexual intercourse, can lead to an issue of control over one's fears of betrayal by the partner: if there is complicity and after all, agreement is not really like being betrayed (“With whom I have chosen yes, with others no!”);
or the deliberate infringement of the pact of fidelity between the members of the couple (more often these are people linked by marriage) can lead to a feeling of omnipotence ("I am able to handle situations that others normally do not tolerate") ;
it could be the desire for a betrayal of the partner and the attempt to appease his sense of guilt by making sure that she is the one to cheat;
it could also hide a sense of inferiority and low self-esteem: reciprocity of the sexual act is avoided so as not to incur a possible rejection and consequently experience frustration, while not depriving the loved woman of her "right" satisfaction;
it could also be a question of a relationship of submission of the husband to his wife, who would impose this conduct on him accompanied by a limitation or even a denial of sexual relations between them;
again, the man could seek this situation to experience his condition as a form of humiliation in order to be able to derive masochistic pleasure from it.
Naturally, when such conduct is no longer a source of pleasure but, for various reasons, comes to cause clinically significant discomfort and/or impairment of important areas of one's life (for example, having repercussions in family, friend and social relationships or in work), it would be advisable to contact a psychotherapist who is a specialist in clinical sexology, who, following the appropriate diagnostic evaluations, can indicate the appropriate therapeutic path to follow.