William Costello (@CostelloWilliam) / X

William Costello

27.8K posts

William Costello

@CostelloWilliam

🇮🇪 Doctoral researcher @ProfDavidBuss Evolutionary Psychology Lab @UTAustin

Austin, TX

researchgate.net/profile/Willia…

Joined March 2011

Pinned
William Costello
@CostelloWilliam
Apr 29
New from my stellar coauthors and me in Evolution and Human Behavior. Courtship in cross-sex friendship: novel tests of male financial provisioning as a signal and cue of mating interest. Part of @JaimieKrems special issue on Friendship sciencedirect.com/science/articl…
20K
William Costello
@CostelloWilliam
Apr 2, 2025
“Men are not adapting well to a society where women are better educated, compete with them for jobs and do not want to have babies with them.”
Meet the incels and anti-feminists of Asia
From economist.com
3.5M
William Costello
@CostelloWilliam
May 21, 2025
Incel mindset
164K
William Costello
@CostelloWilliam
Apr 2, 2025
Replying to @ArturFufkin
They dominate psychology. I know the high esteem you hold psychology in 🙄
86K
William Costello
@CostelloWilliam
Apr 23, 2025
Many men resent women’s ability to attract short-term sex partners because it’s what they themselves see as a dream scenario. They misread this as a privilege, ignoring that most women aren’t short-term mating oriented Classic failure of cross-sex mindreading 👨‍💻💭🙎‍♀️🧠❌ = 🤷‍♀️🤦‍♀️
113K
William Costello
@CostelloWilliam
Nov 9, 2025
Incels already suffer enormously due to their difficulties in attracting a romantic partner, do they really deserve to be taxed extra while they struggle?
Jessica Pin
@jess_ann_pin
Nov 8, 2025
Yes. Men should have to pay extra taxes for being single after age 30. Those taxes can go towards financial incentives for married couples to have children. That solves birth rates. Boom. You’re welcome. The reason men specifically need to be taxed extra, especially above
59K
William Costello
@CostelloWilliam
Sep 2, 2022
Jordan Peterson to incels: “…women are not wrong about you…clean your room”. Mainstream media: “Jordan Peterson is a hero to the incels”. 😅 @jordanbpeterson
Olivia Wilde based ‘terrifying’ Don’t Worry Darling character on Jordan Peterson
From independent.co.uk
William Costello
@CostelloWilliam
May 3, 2021
If you can’t pronounce the following names it means you’re prejudiced against the Irish. Cathal Meadhbh Saoirse Tadhg Aoife Niamh
KUOW Public Radio
@KUOW
Mar 22, 2019
A rose by any other name would not be me — the racist practice of mispronouncing names: bit.ly/2Wi1wiK
William Costello
@CostelloWilliam
Apr 13, 2025
Around 75% of men agreed to have sex with a complete stranger, whereas no women (0 percent) agreed. In terms of effect size, this is one of the largest sex differences ever discovered in psychological science. psychologytoday.com/nz/blog/sexual…
99K
William Costello
@CostelloWilliam
Apr 13, 2025
Two-thirds of romantic partners were friends first. A recent meta-analysis (N = 1,897) shows that the friends-to-lovers pathway is not just common, it’s preferred, especially among university students. 👩‍🤝‍👨 ➡️ ❤️
researchgate.net
(PDF) The Friends-to-Lovers Pathway to Romance: Prevalent, Preferred, and Overlooked by Science
PDF | There is more than one pathway to romance, but relationship science does not reflect this reality. Our research reveals that relationship... | Find, read and cite all the research you need on...
151K
William Costello
@CostelloWilliam
Oct 20, 2025
Add low agreeableness and conscientiousness to the mix. Teenagers are monsters 😂
Rob Henderson
@robkhenderson
Oct 19, 2025
"age differences in the Dark Triad often dwarf sex differences. So, for example, while men are somewhat more Machiavellian than women at every age, young women are far more Machiavellian than middle-aged men." stevestewartwilliams.com/p/12-things-ev…
76K
William Costello
@CostelloWilliam
Feb 9, 2023
Tinder study with ~3,600 profiles. Women strongly prefer highly educated potential partners. Female subjects, (super)like higher educated profiles 92.2% more often. No evidence that men have an aversion to a highly educated potential partner. sciencedirect.com/science/articl…
260K
William Costello
@CostelloWilliam
Mar 31, 2025
Replying to @Keir_Starmer
With respect Prime Minister, policy should be informed by sober research, not highly emotive performance art, no matter how powerful the acting is. Here’s some incel research we conducted with support from @CommissionCE and presented to the @CommonsWEC.
gov.uk
Predicting harm among incels (involuntary celibates)
This is the largest survey of incels to-date, taken across the UK and the US. It explores their demographics, beliefs, networks and propensity to violence.
96K
William Costello
@CostelloWilliam
Nov 13, 2023
Is this true when we consider how many women talk about short men?
Pop Base
@PopBase
Nov 13, 2023
Billie Eilish says men don’t face criticism about their bodies because girls are nice: “Nobody ever says a thing about men’s bodies. If you’re muscular, cool. If you’re not, cool. If you’re rail thin, cool. If you have a dad bod, cool. If you’re pudgy, love it! Everybody’s happy
Readers added context
Billie Eilish has publicly criticized women dating “ugly men” and has said that ugly men deserve nothing on recorded promotional interviews youtube.com/watch?v=PMrxwi…
124K