I can think of dozens of exceptions to this, but on the other hand a number of my gay friends have several older brothers. Anyway, I love these scientific studies because next week, something will come out that contradicts this week's studies.
Study Links Male Gays, Birth of Older Brothers
Having one or more older brothers boosts the likelihood of a boy growing up to be gay — an effect due not to social factors, but biological events that occur in their mother's womb, according to a study published today.
In an analysis of 905 men and their siblings, Canadian psychologist Anthony Bogaert found no evidence that social interactions among family members played a role in determining whether a man was gay or straight.
The only significant factor was the number of times a mother had previously given birth to boys, according to the report in the Proceedings of the National Academy of Sciences...