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Here's an interesting article concerning the sexual orientation of fruit flies and the scientists' perhaps successful attempts to manipulate sexual orientation through gene manipulation. Gay rights activists will of course point to it in order to prove what (to many of us) is obvious - that sexual orientation is not a choice. But conservatives (after first denying any comparison between humans and fruit fries in this matter) will probably look to the future and ask if gene manipulation could be used to wipe the gay orientation out of human existence in the future.
Don't expect any changes in opinions based upon this study
The Political Heretic