This is an easy problem to fix. Tell your wife to say, "That's right. I am a racist. Like most white women, I would never accept your black hands on me. I appreciate men with an IQ over 80, as to be mentally stimulated is what truly turns me on. So on those grounds, you just can't compete, and never will. So go bother some of the non-racists who you actually think are turned on by your physical features who actually will, sooner or later, become quite tired of you after the physical thrill wears off and they recognize just exactly how stupid you are."