Sexual attraction is driven by genetics from "summary" of Sex on the Brain by Deborah Blum
In one influential study, researchers gathered data on more than four hundred female twins. The goal was to determine how much of sexual orientation might be inherited. And the results suggested that about thirty percent of the variance in sexual orientation was due to genetic factors. The findings implied that genetics played a significant role in shaping sexual attraction. It's not just twins, either. Scientists have found similar results in studies of adopted siblings. This type of research provides further evidence that genetics contributes to sexual orientation. The idea that sexual attraction is influenced by genetic f...
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