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性行為的基本類型
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3.
同性性交 |
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性的層階問題 |
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當然，諸如此類的分類不是什麼創新的和革命性的進展。眾所周知，存在參與異性性行為的人，也存在參與同性性行為的人。人們也熟知，一些人與兩個性別都有性行為發生。不過，在金西的大型統計學調查研究之前，大多數“專家”只是假定專有異性性行為的人的百分比是如此之大，而其它所有類型的性行為的人的百分比是如此之小，以至於任何等級量表也絕無希望超出於這個分佈範圍。換一句話說，有人認為同性性舉止（homosexual
act）是如此罕見，只不過代表著“不正常的”和反常的例外狀態。
金西證實了這種傳統的觀點是完全錯誤的。例如，他的統計資料揭示，隨著人到中年，約50%的男性（和20%的女性）與自己的性別成員就已經有了某種明顯的性愛體驗。這些統計資料後來引起了爭議，而且其他研究者得到了低得多的百分比統計資料。然而，金西的基礎研究成果經住了時間的考驗：異性戀和同性戀是層階問題： |
性取向
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用性取向定義一個人的異性戀或同性戀狀態。一個人的性取向以他/她的性伴的偏好為基礎。
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人們在性的層級上是異性戀或同性戀，這就表明他們被另一性的性伴所性吸引或被同性所性吸引。大多數個體發展成明顯的對另一性的性伴有性喜好（異性戀）。
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但是，少數人對男性和女性都有性吸引喜好（雙性戀），甚至還有更少的人主要對自身性別的性伴有性吸引喜好（同性戀）。
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Basic Types of Sexual Behavior |
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3. Homosexual Intercourse
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A Matter of Degree
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There is, of course, nothing new or revolutionary about these categories as such. It has always been known that there are people who engage only in heterosexual intercourse, and that there are others who engage only in homosexual intercourse. It was also well understood that some individuals have intercourse with members of both sexes. However, before Kinsey’s large statistical studies, most “experts” simply assumed that the percentage of people with exclusively heterosexual histories was so great and the percentage of all others so small that any scale would have been hopelessly out of balance. In other words, homosexual acts were believed to be so rare as to represent nothing more than "unnatural" and freakish exceptions.
Kinsey showed that this traditional view was quite mistaken. For example, his statistics revealed that, by the time they reach middle age, about 50% of all males (and 20% of all females) have had some sort of overt erotic experience with members of their own sex. These numbers were later disputed, and other researchers arrived at much lower percentages. Nevertheless, Kinsey’s basic finding has stood the test of time:
Heterosexuality and homosexuality are matters of degree:
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Sexual Orientation
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Sexual orientation is defined as a person's heterosexuality or homosexuality. It is determined on the basis of preference for sexual partners.
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People are heterosexual or homosexual to the degree in which they are erotically attracted to partners of the other or same sex.
Most individuals develop a clear erotic preference for partners of the other sex (heterosexuality).
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However, a minority are erotically attracted to both women and men (bisexuality), and an even smaller minority are attracted mainly to partners of their own sex (homosexuality).
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