Ted Gray, an engineer, has been dancing since his teens. Ted and Marilyn consider dancing primarily a social and romantic activity. Occasionally, they enter amateur dance competitions. As a couple they have given many formal and informal group lessons—at home, at conferences and on a cruise ship. Ted is a mechanical engineer with forty years experience in design and analysis of structures, and prevention of vibration. He is an amateur student of history, enjoying especially the biographies of great Americans and the history of technology. He has been a student of Objectivism for many years.