What makes someone gay? Science is trying to get it straight.

Evolutionarily speaking, being gay is still something of an enigma

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  • Heterosexual people have been less interesting to scientists than gay people, in terms of where they come from, because, evolutionarily speaking, being gay doesn't lead to a higher "higher reproductive fitness" — meaning, it doesn't lead to more babies.
  • Across cultures, gay boys tend to be more interested in spending time with their mothers.
  • We still don't really know why gay people are attracted to each other.
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Americans have become less biased — in regard to race, disability, and sexuality — since 2004

The study suggest implicit biases can change significantly over a relatively short timeframe.

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  • The study examined the results of more than 4 million tests designed to measure implicit and explicit biases.
  • The tests measured attitudes toward groups defined by age, disability, body weight, race, skin tone, and sexuality.
  • All explicit biases decreased during the study's timeframe, while several categories of implicit bias diminished.
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The evolution of homosexuality: A new theory

How did human homosexuality evolve?

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People Are Aggressively Prejudiced If They Think They Won't Get Caught, Study Finds

A study suggests people act aggressively on their prejudices when they have plausible deniability.

Photo from the Milgram experiment.

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