The sexual connotations of the phrase "make out" appear to have developed in the 1930s and 1940s from the phrase's other meaning: "to succeed". Originally, it meant "to seduce" or "to have sexual intercourse".
For the behavior in which animals maintain one another's appearance also called "petting", see Social grooming.
The perceived significance of making out may be affected by the age and relative sexual experience of the participants. Teenagers sometimes play party games in which making out is the main activity as an act of exploration. Games in this category include seven minutes in heaven and spin the bottle.
Lief, Harold I. (1975). Medical Aspects of Human Sexuality: 750 Questions Answered by 500 Authorities. Williams & Wilkins. p. 242. Among the city kids of 13 to 17 who live along the Boston, New York, Philadelphia string, "making out" is heavy petting.
Breed, Warren (1956). "Sex, Class and Socialization in Dating". Marriage and Family Living. 18 (2): 137–144. doi:10.2307/348638. ISSN 0885-7059. JSTOR 348638. /wiki/Doi_(identifier)
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Breed, Warren (1956). "Sex, Class and Socialization in Dating". Marriage and Family Living. 18 (2): 137–144. doi:10.2307/348638. ISSN 0885-7059. JSTOR 348638. /wiki/Doi_(identifier)
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Partridge, Eric (2006). The New Partridge Dictionary of Slang and Unconventional English. New York: Routledge. p. 1259. ISBN 0-415-25938-X. 0-415-25938-X
O'Connell, Jennifer (December 15, 2014). "Don't mind us: Jennifer O'Connell on the marvels of Hiberno-English". The Irish Times. Retrieved October 26, 2017. https://www.irishtimes.com/life-and-style/people/don-t-mind-us-jennifer-o-connell-on-the-marvels-of-hiberno-english-1.2035719
Lindeke, Bill (September 17, 2015). "The unwritten rules of making out in parks". MinnPost. Retrieved March 16, 2018. https://www.minnpost.com/cityscape/2015/09/unwritten-rules-making-out-parks
Olsen, Hannah Brooks (September 28, 2015). "How to Hook Up in Public". Bloomberg. Archived from the original on January 27, 2022. Retrieved March 16, 2018. https://www.citylab.com/life/2015/09/how-to-hook-up-in-public/407392/
Moe, Albert F. (1966) "'Make out' and Related Usages". American Speech 41(2): 96–107.
Weeks, Linton (June 26, 2015). "When 'Petting Parties' Scandalized The Nation". NPR. Retrieved December 18, 2020. https://www.npr.org/sections/npr-history-dept/2015/05/26/409126557/when-petting-parties-scandalized-the-nation
Staff (February 17, 1922). "Mothers Complain that Modern Girls 'Vamp' Their Sons at Petting Parties". The New York Times.
An earlier article in the same newspaper rebutted an attack on the behaviour of American girls made recently in the Cosmopolitan by Elinor Glyn. It admitted the existence of petting parties but considered the activities were no worse than those which had gone on in earlier times under the guise of "kissing games", adding that tales of what occurred at such events were likely to be exaggerated by an older generation influenced by traditional misogyny
Dupuy, Mrs William Atherton (October 15, 1921). "Let Girls Smoke, Mrs. Dupuy's Plea; Penwomen's President Rises in Defense of Young Thing Who 'Parks Corsets' Before Dance. MRS.GLYN WRONG, SHE SAYS Declares Short-Skirt Girl of Today Who Goes to "Petting Parties" Is All She Should Be". The New York Times.
https://timesmachine.nytimes.com/timesmachine/1922/02/17/98986843.html?pageNumber=1
McArthur, Judith N; Smith, Harold L (2010). Texas Through Women's Eyes: The Twentieth-Century Experience. University of Texas Press. pp. 104–05. ISBN 9780292778351. The spirit of the petting party is light and frivolous. Its object is not marriage – only a momentary thrill. It completely gives the lie to those sweet, old phrases, "the only man" and "the only girl". For where there used to be only one girl there may be a score of them now. 9780292778351
Drowne, Kathleen Morgan; Huber, Patrick (2004). The 1920s. Bloomsbury Academic. p. 45. ISBN 9780313320132. 9780313320132
Nelson, Lawrence J (2003). Rumors of Indiscretion. University of Missouri Press. p. 39. ISBN 9780826262905.. 9780826262905
Bragdon, Claude (2007). Delphic Woman. Cosimo. pp. 45–46. ISBN 9781596054301.. 9781596054301
"Petting Parties at Theatres Blushingful Aweful - She Says". Variety. 88 (7). New York City: Variety, Inc.: 1, 31 August 31, 1927. Retrieved June 12, 2023. https://archive.org/details/variety87-1927-08/page/n296/mode/1up
Havemann, Ernest. "The Kinsey Report on Women" Life magazine (August 24, 1953) https://books.google.com/books?id=EkgEAAAAMBAJ&pg=PA45
Duenil, Lynn (1995). The Modern Temper: American Culture and Society in the 1920s. New York, NY: Hill and Wang. p. 136.
Quoted in Malcolm, Janet. Psychoanalysis: The Impossible Profession (London 1988) pp. 37-8
Weeks, Linton (May 26, 2015). "When 'Petting Parties' Scandalized The Nation". National Public Radio. National Public Radio, Inc. Retrieved April 6, 2023. https://www.npr.org/sections/npr-history-dept/2015/05/26/409126557/when-petting-parties-scandalized-the-nation
Breines, Wini (2001). Young, White, and Miserable: Growing Up Female in the Fifties. University of Chicago Press. pp. 117–118. ISBN 0-226-07261-4. 0-226-07261-4
Breed, Warren (1956). "Sex, Class and Socialization in Dating". Marriage and Family Living. 18 (2): 137–144. doi:10.2307/348638. ISSN 0885-7059. JSTOR 348638. /wiki/Doi_(identifier)
Weigel, Moira (2016). Labor of Love. Farrar, Straus and Giroux. pp. 76–77. ISBN 9780374182533. 9780374182533
Cann, Kate. Hard Cash (London 2000) pp. 262 and 237
Lafollette, Hugh (2002). Ethics in Practice. Oxford: Blackwell. p. 243. ISBN 0-631-22834-9. "making out," which can comprise a rather wide variety of activities 0-631-22834-9
Lief, Harold I. (1975). Medical Aspects of Human Sexuality: 750 Questions Answered by 500 Authorities. Williams & Wilkins. p. 242. Among the city kids of 13 to 17 who live along the Boston, New York, Philadelphia string, "making out" is heavy petting.
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Lief, Harold I. (1975). Medical Aspects of Human Sexuality: 750 Questions Answered by 500 Authorities. Williams & Wilkins. p. 242. Among the city kids of 13 to 17 who live along the Boston, New York, Philadelphia string, "making out" is heavy petting.
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Partridge, Eric (2006). The New Partridge Dictionary of Slang and Unconventional English. New York: Routledge. p. 1259. ISBN 0-415-25938-X. 0-415-25938-X
"Heavy petting - definition of heavy petting in English from the Oxford dictionary". Archived from the original on December 19, 2012. https://web.archive.org/web/20121219071443/http://oxforddictionaries.com/definition/english/heavy%2Bpetting
Bolin, Anne (1999). Perspectives on Human Sexuality. Albany: State University of New York Press. p. 222. ISBN 0-7914-4133-4. Making out usually refers to kissing or passionate physical contact, but it also may escalate into petting. 0-7914-4133-4
Partridge, Eric (2006). The New Partridge Dictionary of Slang and Unconventional English. New York: Routledge. p. 1259. ISBN 0-415-25938-X. 0-415-25938-X
Crownover, Richard (2005). Making out in English. Boston: Tuttle Publishing. p. 4. ISBN 0-8048-3681-7. "Making out," used in the title of this book is a colloquialism that can mean engaging in sexual intercourse, ... 0-8048-3681-7
"Notes From the State of Virginia", with Wesley Hogan, in First of the Year, vol. II, edited by Benj DeMott (New York: Transaction Publishers, 2010) p.121
From Abba to Zoom: A Pop Culture Encyclopedia of the Late 20th Century by Mansour, David. (2005) ISBN 978-0740751189. p.110 //archive.org/details/fromabbatozoompo0000mans