Modern WisdomEvolution's Secrets To Understanding Relationships - Dr Andrew Thomas
CHAPTERS
- 0:00 – 10:10
Modern dating as evolutionary mismatch: unlimited choice, superficial filters, and online incentives
The conversation opens with the idea that modern environments (especially online dating and pornography cues) exploit ancient mating psychology. They unpack how choice overload and anonymity reshape mate selection into quick heuristics, often emphasizing single traits like height. The chapter also covers why offline introductions via friends/family may reduce ghosting and improve accountability.
- •Evolutionary mismatch: society changes faster than evolved psychology
- •Choice overload on apps leads to univariate filtering (e.g., height cutoffs)
- •Dating-site dynamics: women inundated with messages; men get little inbound attention
- •People adapt by gaming filters (e.g., height inflation) and relying on superficial cues
- •Meeting through social networks adds accountability and better information about partners
- 10:10 – 15:02
Error Management Theory: why men over-perceive interest and women doubt commitment
They explain error management as biased decision-making toward the less costly mistake. Applied to mating, men tend to overread sexual interest (missing an opportunity is costly), while women tend to be skeptical of men’s commitment (being deceived is costly). This frames behaviors like 'playing hard to get' and guarded early-stage commitment.
- •Two error types: false positives vs false negatives with different costs
- •Male sexual over-perception bias as an adaptive 'better safe than sorry' tendency
- •Female skeptical commitment bias: underestimating commitment to avoid costly deception
- •Courtship behaviors can reflect these biases (delayed replies, slower commitment)
- •Biases can reduce harm to self but create friction/miscommunication between sexes
- 15:02 – 19:02
Parental investment and the nuance: men can be just as choosy in long-term mating
Parental investment theory is introduced as a core explanation for sex differences across species. Thomas emphasizes that humans are unusual because men typically invest more than males in many species, moderating sex differences. They stress an important nuance: for long-term relationships, men’s choosiness can approach women’s because both are investing heavily.
- •Bateman principle and gamete differences set up 'market forces' in mating
- •Obligatory parental investment: gestation and weaning raise female minimum costs
- •Humans: relatively high male investment reduces extreme sex differences
- •Women may be choosier in short-term contexts, but men become choosy for long-term
- •Long-term commitment implies large investment (time, parenting), raising standards for both
- 19:02 – 21:53
Sexual strategies framework: short-term vs long-term, and mate-switching dynamics
They lay out the two primary sexual strategies (short-term and long-term) and discuss how many midrange arrangements still functionally resemble short-term mating. The conversation then touches on mate-switching and how infidelity motives may differ on average due to differences in sociosexuality. Both sexes can mate-switch, but intentions may diverge by context.
- •Two dominant strategies: long-term pair-bonding vs short-term mating
- •'Middle ground' relationships often collapse into short-term in measurement
- •Some use short-term dating as a pathway to long-term pairing
- •Mate-switching/monkey-branching: both sexes can do it, motives may differ
- •Sociosexuality shows a large sex difference and helps explain affair motives
- 21:53 – 27:32
Is promiscuity heritable? Genetics, partner choice, and the outsized impact of peers
They discuss evidence and expectations that sociosexuality/promiscuity has heritable components. The implications shift to mate choice as a major determinant of children’s outcomes, while also highlighting the strong role of environments outside the home—especially peer groups and neighborhoods. They connect this to practical parenting advice: select contexts and communities carefully.
- •Sociosexuality likely has meaningful heritability; many traits hover around ~0.5 heritable
- •Partner choice strongly shapes children’s outcomes (genetic and social pathways)
- •Non-home environment (peers/neighborhood) can outweigh within-home effects
- •Parents face undue pressure; basics matter, but peer context is crucial
- •Surrounding yourself with 'better' peers can pull you upward (learning/status/values)
- 27:32 – 32:00
Strategic pluralism: how ecology and safety shift mating strategies
Strategic pluralism describes flexible switching between short- and long-term strategies depending on context. They discuss how danger can push people toward long-term bonding for stability, but extreme danger can flip people into 'end-of-the-world' promiscuity. Sex ratio cues are introduced as one environmental signal that can shift short-term mating inclination.
- •Not everyone has a single stable mating strategy; many people 'flick' between them
- •Moderate danger can increase long-term mating for safety and cooperative childrearing
- •Extreme danger can produce promiscuous 'no future' behavior (U-shaped pattern)
- •Sex ratio cues can temporarily shift short-term mating desire
- •Different strategies can balance out over generations, maintaining variation in populations
- 32:00 – 36:45
Arousal as a switch: horniness increases short-term mating interest (and why that matters)
Thomas describes research showing that sexual arousal reliably increases men’s interest in short-term mating, even controlling for trait sociosexuality and Dark Triad traits. They explore why this may reflect mismatch—modern cues trigger ancient 'sex is imminent' psychology. The takeaway is practical: arousal changes judgment, so decisions made while aroused can be systematically different.
- •Experimental finding: arousal increases short-term mating interest in men
- •Effect persists even after controlling for sociosexuality and Dark Triad traits
- •Mismatch explanation: modern sexual cues hijack systems evolved for real opportunities
- •Arousal can shift decision-making; 'hot vs cold' states alter priorities
- •Implications spill into harassment research and understanding boundary-pushing
- 36:45 – 46:55
Sexual harassment: predators vs misunderstandings, theory-of-mind failures, and 'luck pushing'
They distinguish between predatory harassment and behavior arising from miscalibration and assumptions about mutual intent. High sociosexuality predicts more sexually forward behavior partly because people project their own strategy onto others. They also discuss token resistance/playing hard to get research, how misreading it can be dangerous, and ongoing work on persistence after rejection ('luck pushing').
- •Two broad categories: deliberate predation vs clumsy misunderstanding/miscalibration
- •Theory of mind limits: high sociosexual individuals assume others want sex sooner
- •Short-term strategy focuses on rapid escalation; can cause distress if mismatched
- •Token resistance/playing hard to get: prevalence, timing, and misinterpretation risks
- •Research direction: persistence after rejection and educating about harm and boundaries
- 46:55 – 52:55
Young male sexlessness and declining social skill: flirting as a learnable (and now neglected) skill
They connect rising sexlessness among young men to weakening social and flirting skills, not just economic or hypergamy narratives. Thomas argues that earlier generations learned these skills through male role models and institutions, whereas modern isolation and online life leave a vacuum. They also discuss the need for constructive outlets and healthy pathways to status via prestige rather than dominance.
- •Sexlessness may reflect degraded social competence and reduced flirting practice
- •Flirting requires reading cues, adjusting behavior, and knowing when to disengage
- •Role-model vacuum invites harmful substitutes (e.g., extreme influencer archetypes)
- •Young men need constructive ways to 'make a mark'—otherwise destructiveness emerges
- •Status pathways: prestige is healthier and more sustainable than dominance
- 52:55 – 1:01:02
Western attitudes to polygyny/polyandry: surprising openness, strong sex differences, and why it’s hard in practice
Thomas presents a UK-based study on interest in polygynous and polyandrous arrangements despite legal and social sanctions. About a third of men report openness to polygyny, while women’s willingness to be a co-wife is far lower; polyandry interest is low and similar across sexes. They discuss why polygyny appears in many societies and when women may accept it (when benefits outweigh monogamy).
- •UK context: polygamy illegal and socially sanctioned, yet interest still measurable
- •~1/3 of men open to polygyny; women’s co-wife interest around ~1/20
- •Polyandry: low endorsement and minimal sex difference (roughly ~10% 'yes')
- •Anthropology: many hunter-gatherer societies permit polygyny, often for high-status men
- •Women may accept polygyny when resource benefits exceed monogamous alternatives
- 1:01:02 – 1:04:21
From polygyny to coercive control: foot binding, FGM, and cultural persistence
The discussion briefly turns to historical and cultural practices linked to controlling women’s mobility and sexuality. They contrast male circumcision with the severity of FGM and emphasize the role of social transmission, including women enforcing norms. The segment underscores how cultural artifacts can persist even when morally repugnant.
- •Hypotheses about control mechanisms in harems and restricting women’s autonomy
- •Foot binding discussed as a femininity aesthetic with severe physical consequences
- •FGM framed as extreme control with devastating harm
- •Cultural practices can be perpetuated by women as well as men via social norms
- •Recognition that 'cultural relativism' has limits when harm is severe
- 1:04:21 – 1:14:52
How many past sexual partners is 'too many'? The U-shaped preference curve and what it signals
Thomas explains research on how partner count affects desirability, especially for long-term relationships. Preferences show a U-shaped curve peaking around 3–4 partners; both very low (virgin) and very high counts reduce desirability, for different perceived reasons. They preview a larger cross-national follow-up adding timing/recency of partners as a crucial extra dimension.
- •Long-term desirability peaks around ~3–4 partners (U-shaped curve)
- •Very low count can trigger suspicion (why zero?)—a preselection concern
- •High count raises perceived risks (STIs, infidelity, instability)
- •Sex differences are small for long-term evaluation; bigger differences appear for short-term contexts
- •New study: 10-country replication and adding recency distribution (past vs recent activity)
- 1:14:52 – 1:24:39
What ChatGPT gets wrong about mate preferences: equalizing sex differences and demoting 'pleasing disposition'
They test ChatGPT’s predictions against decades of mate preference ranking research. ChatGPT incorrectly outputs near-identical rankings for men and women and dramatically undervalues 'pleasing disposition,' a consistently top-ranked trait in human surveys. They interpret this as cultural aggregation plus alignment constraints, raising concerns about people using AI for dating advice.
- •Mate preference measurement: ranking/forced-choice reveals priorities better than Likert ratings
- •ChatGPT predicts identical male/female rankings (implausible vs 80 years of data)
- •It overemphasizes looks and underweights traits important for long-term success
- •Pleasing disposition—a stable top trait in research—gets pushed to the bottom by ChatGPT
- •AI dating advice risks being 'PC' and context-insensitive rather than practically useful
- 1:24:39 – 1:34:30
Why 'pleasing disposition' matters in real life: speed dating signals, context selection, and rethinking the friend zone
Thomas argues that agreeable, easy-to-be-around traits do matter, but app-based filtering prioritizes looks first and hides holistic qualities. He cites speed-dating findings where political tolerance predicts success, linking it to pleasant disposition. They close with practical guidance: choose environments that match your relationship goals (book clubs vs nightclubs), and recognize that friendship pathways can be a feature—not a bug—of long-term pairing.
- •App-based mating markets elevate looks as the first hurdle, crowding out deeper traits
- •Speed-dating evidence: political tolerance/easygoingness predicts match success
- •Advice: use contexts that reveal the whole person (speed dating, shared-interest groups)
- •Context selection: long-term seekers should frequent long-term-oriented environments
- •Friend zone reframed: many long-term couples begin as friends; friendship can be a pipeline
- 1:34:30 – 1:35:37
Wrap-up: where to find Dr. Andrew Thomas and participate in upcoming studies
They conclude with Thomas sharing where audiences can follow his work and find his writing. He highlights social accounts tied to his blog and mentions a directory for psychology study recruitment. The episode ends with standard show sign-off.
- •Twitter/X handles: @DrThomasAG and @DatingDarwin
- •Upcoming recruitment for studies (including incel-related research)
- •Website: psychstudies.co.uk for advertising psychology studies
- •Chris thanks Andrew and mentions seeing him at HBES
- •Outro and prompt to watch clips/subscribe
