Broward County public school children are taught the names of their private body parts in first grade. In second grade, they learn that AIDS kills. By high school graduation, they have read about birth control. But homosexuality appears nowhere in the curriculum. Unless a student asks, it simply does not exist. How to deal with homosexuality has become a quandary for Broward public schools. Even though Broward schools prohibit discrimination based on sexual orientation, administrators prefer to keep issues of gay relationships out of the classroom -- even classes dealing with sex, health and social issues.