Although genetics play a part in determining human behavior, at some point there is the possibility that actually zero of the significant genes are part of one's makeup. There may be random bits of DNA that links to a certain race but all the important DNA has come from good people. Saying stuff like "I'm 1/32 Cherokee" is nonsense. It's not like percent of a solution where it can be diluted indefinitely but more like shuffling a deck of cards. Shuffle all black backs with all white backs. Pull out the top 52, there's a mix of black and white backs. Shuffle again with a white deck, then again and again. Each time the number of black backed cards will be cut roughly in half. After 5 shuffles there may be one or two black backed cards. Then to represent the fact that not all DNA is actually expressed as behavior, say only hearts matter. How likely is it that the black back card is a heart? Enough dilution makes "part something" meaningless. Grandparents, maybe great-grandparents matter somewhat, but culture, the nurture part of "nature vs nurture" wins out.
More telling is actual behavior. How do they do in the real world? Does she ask that you pay for sex and increase the amount she wants after you're done?
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