Born Gay
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Video introduction to ProCon.org and the pros and cons of controversial topics

    Is there a "gay" gene?

    Do studies conducted on homosexuality in twins show a genetic basis of sexual orientation?

    Can hormones affect sexual orientation?

    Does the fraternal birth order effect demonstrate a biological basis to sexual orientation?

    Are there physical differences in the brain structure of heterosexual and homosexual people?

    Is there a connection between sexual orientation and handedness?

    Is there a connection between sexual orientation and the ratio between second and fourth finger length?

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