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Older brothers could make you gay |
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Written by asap
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Monday, 26 June 2006 |
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WASHINGTON — All that testosterone doesn’t necessarily make a man straight.
In fact, having several older brothers increases the likelihood of a man being gay, a finding researchers say adds weight to the idea that there is a biological basis for sexual orientation.
RESEARCHER’S STATEMENT
“It’s likely to be a prenatal effect,” said Anthony F. Bogaert of Brock University in St. Catharines, Canada, “This and other studies suggest that there is probably a biological basis for” homosexuality.
THE STUDY
Bogaert studied four groups of Canadian men, a total of 944 people, analyzing the number of brothers and sisters each had, whether or not they lived with those siblings and whether the siblings were related by blood or adopted.
OUTSIDE OPINION
S. Marc Breedlove of Michigan State University said the finding “absolutely” confirms a physical basis.
“Anybody’s first guess would have been that the older brothers were having an effect socially, but this data doesn’t support that,” Breedlove said in a telephone interview.
BIGGER PICTURE
Bogaert cautioned that this needs to be looked at in context of the overall rate of homosexuality in men, which he suggested is about 3 percent. With several older brothers the rate may increase from 3 percent to 5 percent, he said, but that still means 95 percent of men with several older brothers are heterosexual. | Only registered users can write comments.
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