跨性別性行為是描述跨性別人士的性行為。 歷史上，研究認為跨性別性行為可能與傳統的人類性行為有所不同。 在 20 世紀的大部分時間裡，所謂的 性別轉換症 被認為是有性的 American Psychological Association APA2000Gender Identity Disorder in DSM IV TR Buhrish N McConaghy N 1979 Three clinically discrete categories of fetishistic transvestismArchives of Sexual Behavior Volume 8 Number 2 March 1979，因此是這些術語被定義的由來。Wahng SJ 2004 Double Cross Transamasculinity Asian American Gendering in Trappings of Transhood in Aldama AJ ed Violence and the Body Race Gender and the State Indiana University Press ISBN 025334171XThus the institutionalized recognition of the queeridentified or homosexual transsexual is historically groundbreaking Rosario scrutinized how transgenderism has been described in relation to homosexuality and heterosexuality in both the revised third edition and the fourth edition of the DSM In the DSMIIIR the classification of transsexualism was divided into homosexual and heterosexual subtypes However sexual orientation was based on ones birth sex so that an FTM who was attracted to women would be deemed a female homosexual transsexual whereas an FTM attracted to men would be considered a female heterosexual transsexual These diagnoses were especially confusing since a female homosexual transsexual that is an FTM who desires women would actually identify himself as a heterosexual trans man And an FTM who desires men a female heterosexual transsexual would selfidentify as either a gay man or a queeridentified FTM 事實上，和其他所有性別一樣，跨性別人群表現出各種可能的性取向和性吸引，Tobin HJ 2003 Sexuality in Transsexual and Transgender Individuals Part I A Review of the Literature 包括缺乏性吸引力的無性戀。Devor H 1997 FTM FemaletoMale Transsexuals in Society Bloomington Indiana University Press 性取向標籤 歷史上，臨床醫生將跨性別者標記為異性戀或同性戀者，與其出生時的性別指定相關。Chivers Meredith L Bailey J Michael Sexual Orientation of FemaletoMale Transsexuals A Comparison of Homosexual and Nonhomosexual Types Archives of Sexual Behavior 大多數跨性別人士認為這具有冒犯性，並且傾向於定義與其性別認同相關的性取向。Bagemihl B Surrogate phonology and transsexual faggotry A linguistic analogy for uncoupling sexual orientation from gender identity In Queerly Phrased Language Gender and Sexuality Anna Livia Kira Hall eds pp 380 ff Oxford University Press 例如，跨性別女同性戀者同時是跨性別女性（出生時性別指定為男性的女性）和女同性戀者（被其他女性吸引的女性）。 性取向分佈 2015 年針對跨性別者的調查顯示，自我認定為酷兒者佔 21％，泛性戀者佔 18％，男同性戀者或女同性戀者佔 16％，異性戀者佔 15％，雙性戀者佔 14％，而無性戀者佔 10％。 跨性別女性 一次對約 3000 名跨性別女性的調查顯示，至少有 60％被女性吸引。在跨性別女性中，27％的受訪者自稱為同性戀、女同性戀或同性戀愛戀，20％回答雙性戀，19％異性戀，16％男性，6％回答無性，6％酷兒，6％沒有回答。 跨性別男性 到 20 世紀 90 年代中期，跨性別男性中的性別認同和性取向的範圍已經被公認，Linnea Due October 25 1995 Genderation X San Francisco Weekly 大部分跨性別男性主要或完全被女性吸引。Devor H 1993 Sexual Orientation Identities Attractions and Practices of FemaletoMale Transsexuals The Journal of Sex Research Vol 30 No 4 Nov 1993 pp 303315Devor H 1997 FTM Femaletomale transsexuals in society Indiana University Press Ira B Pauly 1998 Gender Identity and Sexual Orientation In Dallas Denny ed Current Concepts in Transgender Identity Routledge Virginia A Sadock Harold I Kaplan 2008 Kaplan and Sadocks Concise Textbook of Clinical Psychiatry p 329 Lippincott Williams Wilkins Foerster 報道了一位女性與一位在 20 世紀 60 年代後期性別轉換的跨性別男性之間已有 15 年成功的關係。G Kockott E M Fahrner 1988 Maletofemale and Femaletomale transsexuals A comparison Archives of Sexual Behavior Volume 17 Number 6 December 1988 性取向和性別轉換 一些跨性別人士在他們的一生中保持一致的性取向，Ashley A Thompson D 1986 The First Lady John Blake Publishing Cossey C 1992 My Story Faber Faber 在某些情況下，性別轉換後仍與同一個伴侶在一起。Boylan JF 2003 Shes Not There A Life in Two Genders Broadway 在其他情況下，他們在性伴侶方面的選擇可能會在性別轉換後發生改變。 參見 參考文獻 Category 性行為 Category 跨性別