Another finding, not exactly new, perhaps another glimpse at fetal causes of homosexuality?

  • Menergy_1

    Posts: 736

    Jan 01, 2009 7:00 PM GMT

    Canadian Scientists Find More Homosexuals Left-Handed
    ScienceDaily (July 10, 2000) — Three Canadian researchers have shown that left-handedness is more common in gay men and in lesbian women than in comparable heterosexual persons. Drs. Martin L. Lalumière, Ray Blanchard, and Kenneth J. Zucker, of the Centre for Addiction and Mental Health (CAMH) and the University of Toronto, reached this conclusion by means of a meta-analysis -- a statistical technique for combining the results of many previous studies in order to reach a reliable conclusion.

    The study, published in the July issue of Psychological Bulletin, combined the results from 23,410 heterosexual and homosexual men and women. The results for both sexes were statistically significant; however, the tendency toward increased levels of left-handedness was markedly greater for lesbian women than for gay men.
    The importance of these results lies in their theoretical implications. Handedness is determined early in development -- probably before birth. Therefore, the correlation of handedness and sexual orientation demonstrates that at least some influences on adult sexual orientation operate quite early, maybe even before an individual is born. The results also suggest that there may be at least one cause of homosexuality that is common to both gay men and lesbian women. This is in contrast to much other biological research on sexual orientation, which has usually suggested that sexual orientation in men is influenced by different factors than sexual orientation in women.
    Although the findings of increased left-handedness in homosexual persons are quite reliable, they are small in absolute magnitude, and they have no application besides providing clues to the origins of sexual orientation. Handedness could not be used to decide whether someone else (or oneself) is gay, lesbian, or heterosexual.
    The Centre for Addiction and Mental Health is Canada's largest centre in the area of mental health and addictions. A World Health Organization Centre of Excellence and a teaching hospital fully affiliated with the University of Toronto, the Centre was established in 1998 through the merger of the Addiction Research Foundation, the Clarke Institute of Psychiatry, the Donwood Institute and the Queen Street Mental Health Centre.
  • JohnG16775

    Posts: 235

    Jan 01, 2009 7:31 PM GMT
    But Im right handed, just ask my dingo,,,,,,icon_smile.gif
    Guess im not homosexual rats
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    Jan 01, 2009 7:41 PM GMT
    A bit tangential to the topic....alright, a whole lot tangential to the topic.....Personally, I find the whole discussion of establishing homosexuality as innate for it to be valid as ridiculous. Religion isnt innate and it isnt a basis for any civil rights or participation.
  • puttputt

    Posts: 254

    Jan 01, 2009 8:18 PM GMT
    Re: Caslon

    I agree. Do we really believe that by demonstrating a biological origin of homosexuality less prejudice would be forthcoming? This is called the naturalistic fallacy; just because something occurs in nature doesn't mean people will tolerate the expression of those behaviors. Even if it is a choice (and I'm not saying that it is), what's wrong with that?

    Re: original post

    Handedness is probably just another indicator of how sexual dimorphism will differ in same-sex subjects depending on sexual orientation. For example, people have found that lesbian women and straight men perform similarly on various cognitive tasks and have similar patterns of brain connectivity (even subcortical structures that are not really subject to environmental influence), whereas gay men are similar to straight women. Left-handedness is accompanied by differences in brain connectivity from right-handedness... and since more men are left-handed, it makes sense that there are more left-handed lesbians than gay men given previous findings.

    For a review, see the following:

    Savic, I. & Lindström, P. (2008 ). PET and MRI show differences in cerebral asymmetry and functional connectivity between homo- and heterosexual subjects. Proceedings of the National Academy of Sciences, 105, 9403-9408.
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    Jan 09, 2009 6:58 PM GMT
    Great, now everytime I see a hot guy who's left handed I'm gonna start thinking he's gay! Which in my case the only thing i do with my left hand is write, everything else is my right hand, such as typing this post, jacking off, tennis-playing, etc.
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    Jan 09, 2009 7:05 PM GMT
    I agree with you Caslon. I don't think it should matter whether it is innate or a choice. I don't personally think it is a choice but I really don't think this should be an issue. The point is we are who we are, and there is nothing wrong with who we are.

    However, I do find the various scientific theories interesting. While I think it is interesting to understand whether there is a genetic reason for being gay, I do worry that some nut cases will then try to fix it.
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    Jan 09, 2009 7:29 PM GMT
    I don't find it an issue, either. BUT I find it interesting and worth knowing. IF sexuality begins with something innate, why not know it?

    It's not small coincidence that in previous eras - possibly still in some places - left-handedness was considered anything from sub-standard to a defect to evil. We seem to have gotten past that.

    I think sometimes of a friend of mine who is gay, blonde and blue-eyed and left-handed. I wonder what all those traits together makes for in terms of rarity in the human population overall?! Oh, he's also a talented artist. hmm. Curiouser and curiouser.
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    Jan 09, 2009 7:42 PM GMT
    I wonder when they will find the cause of heterosexuality?
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    Jan 09, 2009 7:53 PM GMT
    MunchingZombie saidI wonder when they will find the cause of heterosexuality?

    First of all they're called breeders. Secondly, I believe the cause is Darwin and a lot of booze. I know both my kids were conceived after I got her drunk... BTW I am no longer a breeder. Too many hangovers.
    It's obviously a choice, since the natural inclination is to be gay. These people are freaks and perverts.