No one raises an eyebrow if you suggest that a guy who arranges his furniture just so, likes techno music or show tunes, and knows all of Bette Davis's best lines by heart might, just possibly, be gay. But if you assert that male homosexuality is a cultural practice, expressive of a unique subjectivity and a distinctive relation to mainstream society, people will protest. This, they will say, is just a stereotype. David Halperin, a pioneer of LGBTQ...