Gender, Movements, and Symbolic Boundaries". Conducting prospective studies of this sort is not terribly practical, explain Bailey and Zucker, for several reasons. First, homosexual men do tend to have a higher birth order than heterosexual men, and this higher birth order is attributed to homosexual men having greater number of older brothers. However, they're largely just stereotypes:. However, this tactic can be hit or miss since the guy might be gay and still not come out, or not be gay in the first place. Ray Blanchard identified the association and referred to it as the fraternal birth order effect. The existence of the fraternal birth order effect on male sexual orientation has been confirmed many times.
The fraternal birth-order effect on male sexual orientation" PDF.
Gender, Movements, and Symbolic Boundaries". In fact, toy interests are another key sex difference, with boys gravitating towards things like toy machine guns and monster trucks and girls orienting towards neotenous dolls and hyperfeminized figurines. Participants were also asked "How sexually attracted are you to women? Hidden categories:
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