As editor of the series "Perspectives in Sexuality: Behavior, Research, and Therapy," I consider it a major scholarly achievement to publish selected proceedings of the Second International Congress of Sexology. Never before have so many professional organizations supported such a conference or so many scholars, from so many coun- tries, participated in such a conference. Eighteen countries were represented; over one hundred papers were presented. The Congress and these proceedings mark an historical mile- stone for sexology in international scientific cooperation. The collaboration of so...