"Certainly in our psychiatric practices," said Marshal Forstein, M.D., chair of the Commission on AIDS, "we are constantly working with people who have sexual issues." But he added that psychiatrists are never taught how to deal with these issues effectively. "As a psychiatrist, you spend many, many hours studying schizophrenia, which affects about 1 percent of the population, but you get almost no training in human sexuality, which affects 100 percent of the population."