Editing Heterosexuality (section)

==Demographics ==
{{Main|Demographics of sexual orientation}}
In their 2016 literature review, Bailey ''et al.'' stated that they "expect that in all cultures the vast majority of individuals are sexually predisposed exclusively to the other sex (i.e., heterosexual)" and that there is no persuasive evidence that the demographics of sexual orientation have varied much across time or place.<ref name="Bailey16" /> Heterosexual activity between only one male and one female is by far the most common type of sociosexual activity.<ref name=":0" />

According to several major studies, 89% to 98% of people have had only heterosexual contact within their lifetime;<ref name = Laumann1994>{{cite book|vauthors=Laumann EO, Gagnon JH, Michael RT, Michaels S|year=1994|title=The social organization of sexuality: Sexual practices in the United States|location=Chicago|publisher=University of Chicago Press|isbn=0226469573}}{{Page needed|date=September 2010}}</ref><ref name = Wellings1994>Wellings, K., Field, J., Johnson, A., & Wadsworth, J. (1994). ''Sexual behavior in Britain: The national survey of sexual attitudes and lifestyles.'' London, UK: Penguin Books.{{Page needed|date=September 2010}}</ref><ref name = Bogaert2004>{{Cite journal|author=Bogaert AF |title=The prevalence of male homosexuality: the effect of fraternal birth order and variations in family size |journal=Journal of Theoretical Biology |volume=230 |issue=1 |pages=33–7 |date=September 2004 |pmid=15275997 |doi=10.1016/j.jtbi.2004.04.035|bibcode=2004JThBi.230...33B }} Bogaert argues that: "The prevalence of male homosexuality is debated. One widely reported early estimate was 10% (e.g., Marmor, 1980; Voeller, 1990). Some recent data provided support for this estimate (Bagley and Tremblay, 1998), but most recent large national samples suggest that the prevalence of male homosexuality in modern western societies, including the United States, is lower than this early estimate (e.g., 1–2% in Billy et al., 1993; 2–3% in Laumann et al., 1994; 6% in Sell et al., 1995; 1–3% in Wellings et al., 1994). It is of note, however, that homosexuality is defined in different ways in these studies. For example, some use same-sex behavior and not same-sex attraction as the operational definition of homosexuality (e.g., Billy et al., 1993); many sex researchers (e.g., Bailey et al., 2000; Bogaert, 2003; Money, 1988; Zucker and Bradley, 1995) now emphasize attraction over overt behavior in conceptualizing sexual orientation." (p. 33) Also: "...the prevalence of male homosexuality (in particular, same-sex attraction) varies over time and across societies (and hence is a "moving target") in part because of two effects: (1) variations in fertility rate or family size; and (2) the fraternal birth order effect. Thus, even if accurately measured in one country at one time, the rate of male homosexuality is subject to change and is not generalizable over time or across societies." (p. 33)</ref><ref name=SavinWilliams2009>{{Cite book | editor1-last = Hope | editor1-first = Debra A | title = Contemporary Perspectives on Lesbian, Gay, and Bisexual Identities | doi = 10.1007/978-0-387-09556-1 | series = Nebraska Symposium on Motivation | volume = 54 | year = 2009 | isbn = 978-0-387-09555-4 | url = https://archive.org/details/contemporarypers0000nebr }}</ref> but this percentage falls to 79–84% when either or both same-sex attraction and behavior are reported.<ref name=SavinWilliams2009/>

A 1992 study reported that 93.9% of males in Britain have only had heterosexual experience, while in France the number was reported at 95.9%.<ref>{{cite web|url=https://query.nytimes.com/gst/fullpage.html?res=9E0CE0D91E3EF93BA35751C1A964958260|title=Sexual Behavior Levels Compared in Studies In Britain and France|date=8 December 1992|work=[[The New York Times]]}}</ref> According to a 2008 poll, 85% of [[British people|Britons]] have only opposite-sex sexual contact while 94% of Britons identify themselves as heterosexual.<ref name=guardianpoll>{{cite news|url=https://www.theguardian.com/lifeandstyle/2008/oct/26/relationships |title=Sex uncovered poll: Homosexuality |newspaper=Guardian |date= 26 October 2008|access-date=24 August 2010 | location=London}}</ref> Similarly, a survey by the UK [[Office for National Statistics]] (ONS) in 2010 found that 95% of Britons identified as heterosexual, 1.5% of Britons identified themselves as homosexual or bisexual, and the last 3.5% gave more vague answers such as "don't know", "other", or did not respond to the question.<ref name="more-or-less-2010-10-01">{{cite web|last=Harford|first=Tim|title=More or Less examines Office for National Statistics figures on gay, lesbian and bisexual people|url=http://www.bbc.co.uk/programmes/b00tznbk|publisher=BBC|date=1 October 2010}}</ref><ref>{{cite web|title=Measuring Sexual Identity : Evaluation Report, 2010|url=http://www.ons.gov.uk/ons/rel/ethnicity/measuring-sexual-identity---evaluation-report/2010/index.html|publisher=[[Office for National Statistics]]|date=23 September 2010}}</ref> In the United States, according to a [[Williams Institute on Sexual Orientation and Gender Identity Law and Public Policy|Williams Institute]] report in April 2011, 96% or approximately 250 million of the adult population are heterosexual.<ref>{{cite web |url=http://williamsinstitute.law.ucla.edu/research/census-lgbt-demographics-studies/how-many-people-are-lesbian-gay-bisexual-and-transgender |author=Gary Gates |title=How Many People are Lesbian, Gay, Bisexual and Transgender? |publisher=[[UCLA School of Law#Sexual orientation law|The Williams Institute]] |date=April 2011 |access-date=May 12, 2014 |archive-date=July 21, 2017 |archive-url=https://web.archive.org/web/20170721165514/http://williamsinstitute.law.ucla.edu/research/census-lgbt-demographics-studies/how-many-people-are-lesbian-gay-bisexual-and-transgender/ |url-status=dead }}{{cite web |url=http://williamsinstitute.law.ucla.edu/wp-content/uploads/Gates-How-Many-People-LGBT-Apr-2011.pdf |author=Gary Gates |title=How many people are lesbian, gay, bisexual, and transgender? |publisher=[[UCLA School of Law#Sexual orientation law|The Williams Institute]] |page=1 |date=April 2011}}</ref>

An October 2012 [[Gallup (company)|Gallup]] poll provided unprecedented demographic information about those who identify as heterosexual, arriving at the conclusion that 96.6%, with a margin of error of ±1%, of all U.S. adults identify as heterosexual.<ref name=gallup>{{cite web |url=http://www.gallup.com/poll/158066/special-report-adults-identify-lgbt.aspx |title=Special Report: 3.4% of U.S. Adults Identify as LGBT |last1=Gates |first1=Gary J. |last2=Newport |first2=Frank |date=2012-10-18 |website=[[Gallup (company)|Gallup]] |access-date=2015-01-13}}</ref> The Gallup results show:

{| class="wikitable sortable" style="margin:auto;"
|-
! style="width:100px;"|Age/Gender
! style="width:50px;"|Heterosexual
! style="width:50px;"|Non-heterosexual
! style="width:80px;"|Don't{{nbsp}}know/Refused
|-
| '''18–29'''
| style="text-align:center;"|90.1%
| style="text-align:center;"|6.4%
| style="text-align:center;"|3.5%
|-
| '''30–49'''
| style="text-align:center;"|93.6%
| style="text-align:center;"|3.2%
| style="text-align:center;"|3.2%
|-
| '''50–64'''
| style="text-align:center;"|93.1%
| style="text-align:center;"|2.6%
| style="text-align:center;"|4.3%
|-
| '''65+'''
| style="text-align:center;"|91.5%
| style="text-align:center;"|1.9%
| style="text-align:center;"|6.5%
|-
| colspan="4"  style="text-align:center; height:20px;"|	
|-
| '''18–29, Women'''
| style="text-align:center;"|88.0%
| style="text-align:center;"|8.3%
| style="text-align:center;"|3.8%
|-
| '''18–29, Men'''
| style="text-align:center;"|92.1%
| style="text-align:center;"|4.6%
| style="text-align:center;"|3.3%
|}

In a 2015 YouGov survey of 1,000 adults of the United States, 89% of the sample identified as heterosexual, 4% as homosexual (2% as homosexual male and 2% as homosexual female) and 4% as bisexual (of either sex).<ref>{{cite report|url=https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/isqcugzp6d/tabs_OPI_Kinsey_Scale_20150813.pdf|publisher=Yougov|date=21 August 2015|title=Yougov report}}</ref>

Bailey ''et al.'', in their 2016 review, stated that in recent Western surveys, about 93% of men and 87% of women identify as completely heterosexual, and about 4% of men and 10% of women as mostly heterosexual.<ref name=Bailey16/>