I don't think that you can attribute the motives of men who are attempting to warn you even if by joking as being motivated by racism. Many of these same men themselves are involved with Dominicans. So you may question "Why can men date Dominicanas, yet criticize me for dating a Dominican?" This does appear to be a double standard. In general the gringo male dominan female relationships work out better then the opposite as the values and expectations are simular for both partners. The gringa woman with the Dominican male relationships tend to not work out because of the clash of machista vs feminist values.
I agree with this to a point. I think Dominican female partners fit better into the "fantasy-type" mold of an attentive, sexually available partner that some more traditional Western men prefer. I would add that there is definitely a financial component here insofar as the gringo male is paying the way of the woman in the relationship. Always? Pretty much. Not too many financially independent women in this country.
As a woman, and having seen a lot of these relationships up close, I also think a lot of these gringo guys are deluding themselves. They are a walking bank card, and even if they cannot see the calculating way that they are being played, I have definitely seen it many times.
The Dominican male/gringa relationship is more difficult, I think. Many (not all) Dominican men are Neanderthals in terms of relationship equality, sincerity and faithfulness. They like to feel that they wear the pants and their cultural upbringing gives them a lot of latitude in terms of bad behaviour.
Also, both Dominican men and women are living in a culture of easy sex and rampant infidelity.
Yes, your nubile big-bottomed gal notices when Joseito strips off his shirt to fix the washer. Yes, she takes note when he licks his lips at her behind your back. No, it is not unimaginable that when you are back home getting your residency documents together, she and Joseito are at the cabana (paid for by YOU), having some good, old-fashioned fun!!!!
He understands her situation; no big deal.
Same goes for the ladies, of course. Even the most attractive gringa can have a hard time keeping the attention of her Dominican stud with all the good-looking Dominican trim walking around out there. And once they see he is with YOU, boy oh boy, the offers are plenty as this studly Dominican probably has some access to money as well as a six-pack.
Sure, there are exceptions, love can be found anywhere, but most of these relationships are characterized by great inequalities. The Westerner has money, the Dominican is operating on his or her home turf with all the intrigue, back-door deals, "commissions", and cultural understanding that the gringo lacks.