A merican dress codes seem to grow more lenient by the day. Jeans, sneakers, and T-shirts are ubiquitous among so-called white-collar workers. The taboo against shorts in professional settings, however, has endured. Here in Washington, D.C., the hot, humid summer air feels like a dog’s breath in your face. But legions of male office workers are expected to keep their legs bundled up, even as their female co-workers shiver in the air-conditioned chill. When I exposed my knees at the office