As someone who worked in the bar business for decades, I've seen rather more than I wanted to see in terms of sexual behavior. So here are a few themes that I've picked up from other White males as a reason not to touch a White woman who has been observed to sleep with Black men.
(1) Many Black males tend to be sexually incontinent -they sleep around indiscriminately - and unhygienic. They are far more likely than White males to carry STDs that tend to linger and may not have shown up yet in all of their partners, who thus become ticking VD time bombs. (This is a medical fact.)
(2) Many more Black males than White ones are literally criminals, and White women who sleep with them tend to have loose morals and even violent tendencies against other Whites. (People tend to be judged by the company they keep, and often rightly so.)
(3) White girls who sleep with Blacks tend to have negative daddy issues, rebelling against their own genetics to get back at their White fathers. Psychologically, that's a very bad sign.
(4) Black men have made it very clear that they're not the friends of White men, and White men rightly suspect that in many cases, the friend of your enemy is your enemy. (No sane man wants a woman who is willing to sleep with his enemies. It's not good for their comfort and security.)
(5) Women who copulate with blacks by preference exhibit a sexual pathology that has been artificially created by indoctrination and media conditioning, and is clearly being used by genocidal Kalergian scum to mongrelize the White race out of existence. It's a sign that the woman is stupid, gullible, shallow, and has destructive tendencies toward her own kind.
(6) Many White women have been severely and even publicly beaten and even killed by angry, vindictive Black "partners" who turned out, deep down inside, to hate them. Those who gravitate to blacks anyway thus seem stupid, masochistic, or both.
(7) White women with a history of consorting with Black males are often "drug hoes", and were simply exhibiting "drug-seeking behavior". Many of them have sold / will sell their bottoms for a snootful of snow or crystal (or whatever). No man of sound mind wants a drug ho.
(8) A woman who has slept with one Black male is likely to have slept with many, any of whom may show up in her life looking for a little more of what he's already had. That's not good for a long-term relationship.
(9) Some White women simply prefer blacks. No decent man wants to sleep with a woman who prefer traits that differ markedly from his own, especially if she's a libtard who gets in his face about it all the time.
(10) Not to press on a sore spot, but Black males are often not the brightest bulbs on the White House menorah. A woman who prefers them isn't likely to make a good conversation partner for a highly intelligent White man.
(11) White culture is very different from "black culture". Everyone prefers cultural compatibility in a relationship, if only to maximize shared interests and preferences.
We could literally go on for hours with this. Suffice it to say that I have nothing against people who fall in love for the right reasons despite racial differences. I'm merely being frank about what White men tend to reveal to each other behind closed doors.
White women shouldn't be confused about these issues. They need to know what White men really think of their sexual behavior, as it has been negatively impacting White fertility and reproduction.