
Why Don’t You Have Sex With Your Sister? - Dr Debra Lieberman - #1041
From Modern Wisdom
Published 1/3/2026

From Modern Wisdom
Published 1/3/2026
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…

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