Avoir un Grand frère multiplie vos chances d'être gay selon la science

https://www.google.com/am[...]der-effect-explained/amp/

Les gays du forums vous avez un grand frère ?

This pattern has been documented around Canada and the United States, but it goes well beyond that,” Stetson University psychology professor Scott Semenyna told NPR this week.
“There’s been now many confirmations that this pattern exists in countries like Samoa,” he continued. “It exists in southern Mexico. It exists in places like Turkey and Brazil.”

Known since the 1990s as the fraternal birth order effect, it has been theorized that men have roughly a 33% increased probability of being attracted to men for every older brother they have, according to Semenyna.


Research is looking into the concept that having an older brother increases chances of being gay.

Aucun grand frère de mon côté