Why Do Women Cheat? Evolution Has An Answer

In some fairy-wren populations, up to 76% of chicks were fathered by a male other than the one raising them. So why does cheating exist throughout nature, and why did it evolve in humans? This video looks at the three leading evolutionary explanations: good genes, extra resources, and mate-switching. It also covers the myth of "1 in 10", partible paternity in the Amazon, jealousy, privacy in prehistoric camps, and how farming and property changed relationships. ⏱️ Timestamps 0:00 Imagine raising a child who isn't biologically yours 0:23 Meet the superb fairy-wren 0:38 The shocking DNA results 1:02 Why would women cheat? 1:17 Myth: "1 in 10 children" 1:55 Meet Nara, 100,000 years ago 2:23 Theory 1: The good genes hypothesis 2:58 What fairy-wrens show us 3:20 Theory 2: Resources and survival 3:51 Partible paternity in the Amazon 4:46 Theory 3: Mate-switching 5:22 Why people cheat today 5:53 Jealousy: evolution's defense 6:21 The prehistoric privacy problem 6:48 Farming, property, and laws 7:22 Today's world and old instincts 7:37 The real mystery of human relationships 8:05 A beautiful love story, or a complicated family?