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tacitus -> RE: Homosexuality in the News (5/29/2006 10:15:21 PM)
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quote:
ORIGINAL: Petula4God uhhhhhhhhhhh, Actually, how would you explain a friend I had, the eldest brother saying he was gay, died at 27 from complications of AIDS; younger brothers definately NOT gay. There's nothing surprising about that. Just because having an older brother makes it more likely for a male to be gay, doesn't mean that someone with an older brother will be gay. Nor does it mean that the younger brother of an older brother who is gay will be gay as well. (My younger brother isn't gay, but my brother's brother-in-law is, and he's the only male child in that family.) Let's say, for example, that the odds of a single male child being gay are 1 in 25 or a 4% chance. (This is just for example, so please don't dispute this number). Reseachers have found that if a male child has one older brother, then he is 33% more likely to be gay than the example above: 4% + 0.33 * 4% = 5.32%. Similarly, with two older brothers the chance a male child will be gay is 7.07%. Three olders brothers, 9.4%. So, although each older brother a male has makes it more likely he will be gay, it's not a huge increase in that chance. Therefore in the example of your friend, the younger brother would have had only a slightly increased chance of being gay because he had an older brother, and the fact that the older brother *was* gay doesn't make a difference either way.
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