Resumen
In this opening chapter, we introduce the perspectives that guide the book. We examine
how sexual health might be defi ned and the criteria used to do so. We summarize the
main theoretical approaches to sexuality, in particular the distinction between those
that see it as relatively instinctual and fi xed, and those that see it as socially learned and
as capable of being modifi ed. We make the case for adopting the second of these perspectives
in the context of public health practice, and we emphasize the importance of
taking account of the social and historical context in efforts to understand sexual
health issues, thereby setting the scene for the whole book. Next, we introduce the
concepts of diversity and normality and examine their application in the context of
sexual behaviour. Finally, we consider some of the social and cultural constraints on
sexual behaviour and how these impact on public health efforts to improve sexual
health.