I was telling Rich, Brad, Scott and Chris at dinner last night about research I read that studies why we find incest disgusting. From the CNN article:
Researchers who wanted to find out why it is not only taboo to kiss your sister, but also disgusting, said Wednesday that they have discovered why in a discovery that challenges some basic tenets of Freudian theory.
The instinct evolved naturally and cannot be taught, John Tooby and Leda Cosmides of the University of California Santa Barbara wrote in their report in the journal Nature.
Spending time in the same household and watching your mother care for your brother or sister is all it takes. This is all subconscious, of course, reported the researchers, who worked with Debra Lieberman of the University of Hawaii.
"We went in search of a kin-detection system because some of the most important theories in evolutionary biology said such a thing should exist," Cosmides said in a telephone interview.
"It should regulate both altruism and incest disgust."
Humans have an inbuilt system that does both, they found.
The researchers questioned 600 volunteers, mixing up the questions so that the volunteers did not know the subject of the research. Whatever this kin-detection system is, it appears to be all sub-conscious. It is not seemingly affected by blood relation, either; half-siblings and step-siblings were equally affected as full-siblings by the same factors.
I never took a psychology course, but it is my understanding that Freud taught about sexual feelings towards one’s own mother and siblings. He thought that incest was natural, and society fought those natural urges. Cosmides has her own thoughts on Freud:
Cosmides said Freud had a possible reason for his own feelings — he had a wet nurse who cuddled and breastfed him: "Who their brain thinks is mom is different from who they consciously believe is mom. For them it is quite reasonable that they have an attraction to their mothers."
It is definitely some interesting research. What do you think?
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