Gay? Blame it on big brother

Another study which adds credence to the nature over nurture debate regarding the origins of male homosexuality.

Gay rights groups tend to like these studies, because the reasoning seems to go that if there is a biological explanation for homosexuality then somehow we are more entitled to tolerate it. But should that really matter? Do we really need biology to dispel people's prejudices? Or perhaps biology, and genetics in particular, are going to give people more grounds for intolerance?