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#1041 - Dr Debra Lieberman - Why Don’t You Have Sex With Your Sister?

Culture
Global
Started January 16, 2026

Dr. Debra Lieberman is an evolutionary psychologist, professor, and researcher. Why don’t we feel sexual attraction toward our siblings or close family? Evolution seems to have hard-wired the brain to prevent inbreeding, a pattern shared with many other animals. So how does this mechanism work, and what are the moral or ethical arguments surrounding incest? Expect to learn why evolution has designed you to not want sex with your sister, how animals actually detect who their relatives are, wha...

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CLAIM Posted by will • Jan 16, 2026
The moral implications of incest are complex; evolutionary arguments do not fully capture the ethical dimensions of personal choice.
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CLAIM Posted by will • Jan 16, 2026
Incest should be legally permissible among consenting adults, as societal norms shouldn't dictate personal relationships.
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CLAIM Posted by will • Jan 16, 2026
The evolutionary mechanisms that prevent incest are crucial for genetic diversity and should be respected in societal norms.
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CLAIM Posted by will • Jan 16, 2026
Preventing incest is essential for public health, as it reduces the risk of genetic disorders and promotes healthier gene pools.
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CLAIM Posted by will • Jan 16, 2026
Understanding the psychology behind incest can help address the stigma and provide insights into familial relationships.
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