Sex, a perennially popular subject, has achieved unusual prominence of late. In what is primarily a male, homosexual phenomenon, artists are examining gender roles, politics, and pleasure often in the shadow of the twin specters of AIDS and censorship. Lutz Bacher’s recent series, entitled “Men in Love,” consists of 12-inch squares of unframed mirror, fixed invisibly to the wall like a suite of gleaming Minimalist objects. A short text, varying in length from a sentence to a paragraph, is silk-screened dead center on each slick surface. The jittery, ever-so-slightly-off register reflection of