Dr Andrew Thomas13 March 2023

Evolution's Secrets To Understanding Relationships - Dr Andrew Thomas - #601

0Frameworks

10Insights

Insights & moments

The myth-busts, hot takes, explainers, and tools worth keeping.

Myth Buster· 1

Myth Buster75:00

Why 'Nice' Beats Looks in Long-Term Relationships

Contrary to popular belief, 'pleasing disposition'—being kind and easygoing—ranks higher than physical attractiveness in long-term mate preferences. Yet, this trait is rarely emphasized in dating advice or online profiles.

Pleasing disposition has ranked in the top 5 mate preferences since 1949.
Physical attractiveness ranks lower (~10th out of 18 traits).
Online dating prioritizes looks, neglecting deeper compatibility factors.
Long-term success depends more on personality than appearance.

“Having someone who's easygoing and nice to be around is the most important thing in the world in 10 years.”
Dr. Andrew Thomas · 76:50

“ChatGPT put 'pleasing disposition' at the bottom — it has no idea what people actually want.”
Dr. Andrew Thomas · 80:00

#mate preferences#personality#dating advice#long-term relationships

Hot Take· 1

Hot Take77:00

Why AI Gets Human Dating All Wrong

ChatGPT fails to predict real human mate preferences, claiming men and women rank traits identically — contradicting 80 years of research. It also dismisses 'pleasing disposition' as unimportant, revealing a cultural bias in AI training data.

ChatGPT predicted a correlation of 1.0 between male and female preferences — impossible and incorrect.
It ranked physical appearance high and kindness low, opposite to real-world data.
AI reflects cultural narratives, not evolutionary realities.
Reliance on AI for dating advice could mislead users.

“ChatGPT predicted men and women rank things identically — it never happens in psychology.”
Dr. Andrew Thomas · 78:50

“It thinks 'pleasing disposition' is the worst thing since sliced bread.”
Dr. Andrew Thomas · 80:10

#AI#dating advice#mate preferences#technology bias

Explainer· 4

Explainer01:30

Why Too Many Choices Break Modern Dating

Dr. Andrew Thomas explains how evolutionary mismatch affects dating by overwhelming our stone-age brains with too many options. Ancestrally, people had limited mating choices, but today’s limitless online options lead to superficial judgments and decision fatigue.

Human psychology evolved for small, stable social groups of ~150 people (Dunbar’s number).
Modern dating apps create 'choice overload,' leading people to rely on single traits like height or looks.
People lie about traits (e.g., men exaggerating height) to pass superficial filters.
This mismatch causes people to use arbitrary rules (e.g., race, education) to narrow options.

“We're approaching modern problems with a stone-age brain.”
Dr. Andrew Thomas · 01:50

“People have to use one characteristic to narrow down the playing field.”
Dr. Andrew Thomas · 02:50

#evolutionary psychology#dating apps#cognitive bias#mating strategies

Explainer10:00

How Evolution Shapes Dating Misjudgments

Error Management Theory explains why men overperceive sexual interest and women underperceive commitment. These biases evolved because the cost of missing an opportunity was higher than the cost of a false alarm.

Men are more likely to see sexual interest where none exists to avoid missing mating opportunities.
Women are skeptical of men’s commitment to avoid costly mistakes like single parenthood.
These biases are adaptive remnants from ancestral environments.
They persist even when socially harmful in modern contexts.

“It's better to react and be wrong than not react and face dire consequences.”
Dr. Andrew Thomas · 11:20

“Women are more likely to make errors in judging commitment as lower than it is.”
Dr. Andrew Thomas · 13:30

#error management#sexual bias#evolutionary psychology#dating

Explainer15:00

Why Women Are Choosier in Mating

Parental Investment Theory explains sex differences in mating: women invest more biologically (gestation, nursing), so they’re choosier. Men invest less per gamete but still more than most species, moderating human sex differences.

Women produce few, large eggs; men produce millions of sperm, creating an evolutionary imbalance.
Human males invest heavily in offspring, reducing extreme sex differences seen in other species.
Women are choosier in short-term mating due to pregnancy risks.
In long-term mating, men are equally selective as both sexes invest heavily.

“The sex that invests the most becomes the one that's in demand.”
Dr. Andrew Thomas · 15:20

“Men do compare to other species invest a lot in their offspring.”
Dr. Andrew Thomas · 16:50

#parental investment#sex differences#mating strategies#evolution

Explainer27:30

How People Switch Between Short and Long-Term Mating

Strategic Pluralism describes how individuals adaptively switch between short-term and long-term mating strategies based on environmental cues like safety, resource availability, and sex ratio.

Most people use a mix of short- and long-term mating strategies.
Dangerous environments favor long-term mating for child-rearing support.
Very safe environments with strong social support may favor short-term mating.
Sex ratio and social cues can temporarily shift mating strategy preferences.

“Some people go into end-of-the-world promiscuous mating mode in extreme danger.”
Dr. Andrew Thomas · 29:30

“Different strategies balance out in the long run in terms of fitness.”
Dr. Andrew Thomas · 31:20

#mating strategies#strategic pluralism#evolutionary psychology#sex ratio

Story· 1

Story47:00

The Flirting Crisis and the Missing Role Models

Dr. Thomas shares how the decline of positive male role models — uncles, coaches, mentors — has left young men without guidance on flirting and masculinity, leading to poor social skills and overreliance on figures like Andrew Tate.

Young men lack mentors who teach healthy masculinity.
Flirting is a skill that must be learned, not innate.
Social media and isolation replace real-world interaction.
Vacuum of guidance allows toxic influencers to fill the gap.

“We've got this vacuum and people like Andrew Tate are stepping into it.”
Dr. Andrew Thomas · 47:50

“Young men are just scrolling on their phone — not learning how to contribute positively.”
Dr. Andrew Thomas · 48:20

#masculinity#mentorship#social skills#flirting

Q&A· 1

Q&A64:30

What’s the Ideal Number of Past Partners?

Research shows an optimal number of 3–4 past sexual partners for long-term desirability. Both men and women are less attracted to virgins or those with many partners, forming a U-shaped preference curve.

Zero partners may signal low mate value or inexperience.
Too many partners raises concerns about STIs or infidelity.
The sweet spot is 3–4 partners for long-term relationships.
This pattern is similar across genders for long-term mating.

“Being a virgin is equivalent to having seven or eight partners in terms of desirability.”
Dr. Andrew Thomas · 65:50

“It's a U-shaped curve — risks on both ends.”
Dr. Andrew Thomas · 67:00

#mate value#sexual history#dating#relationships

Tool· 1

Tool55:00

One-Third of Men Open to Polygynous Relationships

A UK study found 33% of men are open to consensual polygynous relationships (one man, multiple women), while only 5% of women would join such an arrangement. Most women reject polygyny, but attitudes toward polyandry (one woman, multiple men) are similar across genders.

33% of men say they’d be open to polygyny.
Only 1 in 20 women would be a co-wife or co-girlfriend.
Polyandry is rejected by ~90% of both men and women.
Stated interest doesn’t always match real-world willingness.

“A third of guys say yes — I'd like two long-term partners who know about each other.”
Dr. Andrew Thomas · 56:00

“Women are drawn to polygyny only if benefits exceed monogamy.”
Dr. Andrew Thomas · 60:00

#polygamy#consensual non-monogamy#mating preferences#relationships

Takeaway· 1

Takeaway08:30

Why Friendships Are Goldmines for Long-Term Love

Most people meet long-term partners through friends, family, or social groups — not dating apps. These contexts provide social accountability and deeper compatibility cues missing online.

Meeting through friends or family is declining but remains effective.
Online dating lacks social consequences for bad behavior (ghosting, lying).
Friends and family often know what’s best for you better than you do.
Real-world events allow holistic evaluation beyond looks.

“The death of everything apart from meeting online — and online’s going up.”
Dr. Andrew Thomas · 08:50

“The friend zone is not necessarily a bad thing — 50 years ago, that’s how people met.”
Dr. Andrew Thomas · 89:30

#friendship#relationship formation#dating apps#social context