本論文分爲三大部分。第一部份介紹心理學者與傳播學者如何使 用性擇論來解釋男女兩性性行爲的差異，亦即『男人喜歡短期、不帶 承諾的性交，女人喜歡長期、忠誠的關係』。這種説法進而被用於解 釋爲何男人喜歡色情A片，女人喜歡羅曼史。本論文第二部份對上述 説法提出批評，指出簡化、通俗化性擇論的課誤，並提出性擇論的其 他觀點。最後，本文企圖將演化生物學與傳播學二者的研究成果加以 結合，以色情與羅曼史的共同主題一性暴力爲例，探討其生物基礎及 媒介再現的特性。 本文雖然指出通俗化性擇論的焊誤，但並不否認生物學觀點的貢 獻。然而，心理學者與傳播學者在使用性擇論時，往往將主流意識型 態與文化中的性別刻板印象帶入號稱客觀中立的科學論述中，並且漠 視自己本行（傳播學）的基本理論。本論文藉由色情媒介與羅曼史的 分析封論，省思自然科學與社會學二者在結合過程中，如何避免跨學 門、跨領域研究易犯的錯誤。

This paper intends to explore three areas of inquiries. First, this paper introduces how psychologists and media scholars use sexual selection theory to explain human sexuality; that is, "men prefer short-term relationship, while women prefer long-term relationship." This statement is further applied to explain why men enjoy pornography and women enjoy romance fiction. The second part of this paper points out the mistakes of over-simplified version of sexual selection theory. Scholars often project gender stereotypes and male-centered ideology into "scientific theory," which is claimed and supposed to be neutral and objective. Finally, this paper focuses on the common theme of pornography and romance — sexual violence, in order to integrate the biological perspective and the media / representation perspective. By referring to sexual selection theory, human sexuality, and media representation, the author of this paper attempts to discuss how to undergo interdisciplinary research.