考慮到多維和寬泛的人類的性象譜，假如可能的話，人們也意識到要想在先天遺傳（生物的性）和後天習性（社會心理的性）之間劃出清晰的界限，是非常困難的。的確，本性和教養都在塑造一個人的性中起作用，精確地說它們中那一個起了多大的作用？確實難以確定。僅一點是確定的：要想很好地理解人類的性，需要在整合自然科學和人文科學方面做出努力。性學，作為一門跨學科的科學，欲努力證明的恰恰就是這一點。性學研究的物件就是作為生物-心理-社會的生物——女人和男人。

Looking at the multidimensional, broad spectrum of human sexuality, one realizes that it is extremely difficult, if not impossible, to draw sharp distinctions between inherited traits (biological sex) and acquired habits (psychosocial sex). Certainly, both nature and nurture play a role, but exactly how large a role each of them plays is often difficult to determine. Only one thing is certain: A better understanding of human sexuality requires the combined efforts of the natural and cultural sciences. Sexology, as an interdisciplinary enterprise, attempts to provide just that. It studies women and men as bio-psycho-social creatures.