United States
State laws still on the books, Lawrence v. Texas, purity culture and the King James Bible: the subject looks very different from one state to another. These are the topics fornication.info covers for American readers.
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Sections
Religion
What scripture, churches and faith communities teach about sex outside marriage, and how that teaching has changed.
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Law
What the law says today, what it used to say, and the court rulings that changed it.
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Language
The words used for fornication, adultery and infidelity, where they come from and how their meaning shifted.
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History
How the country named, judged and eventually stopped punishing sex outside marriage.
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Society
Marriage, cohabitation and births outside marriage: what official statistics and public debates show.
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Culture
Novels, plays, films and songs that put sin, morality and censorship on stage.
10 topics →Religion
Fornication in the Bible: Key Verses from the King James Version
The King James Bible uses "fornication" for the Greek porneia, which it renders that way 26 times. Paul tells readers to "flee fornication" (1 Corinthians 6:18), lists it among the works of the flesh (Galatians 5:19) and presents marriage as the remedy (1 Corinthians 7:2). Churches differ on how broadly the term applies.
View the topic →Sex Before Marriage and Sin: How Christian Denominations Differ
Most Christian traditions teach that sex belongs within marriage: the Catholic Catechism calls fornication gravely contrary to human dignity, and Latter-day Saints follow a law of chastity. Believers are more divided. In a 2019 Pew survey, 57% of US Christians said sex in a committed unmarried relationship is sometimes or always acceptable.
View the topic →What the Catholic Catechism Says About Fornication
The Catechism of the Catholic Church defines fornication as carnal union between an unmarried man and an unmarried woman (paragraph 2353). It calls it gravely contrary to the dignity of persons and of human sexuality, and treats it under the sixth commandment, which Church tradition reads as covering the whole of human sexuality.
View the topic →The Latter-day Saint Law of Chastity Explained
The law of chastity is a commandment of The Church of Jesus Christ of Latter-day Saints: no sexual relations outside a legal marriage between a man and a woman. Members who commit serious sexual sins are asked to confess to a bishop. Church schools such as BYU write the same standard into their Honor Code.
View the topic →How American Evangelicals View Sex Before Marriage
Evangelical churches generally teach that sex is reserved for marriage, a message popularized by pledge campaigns such as True Love Waits. Evangelicals remain the most conservative large Christian group: in Pew's 2019 survey, 46% said sex in a committed unmarried relationship is sometimes or always acceptable, versus 67% of mainline Protestants.
View the topic →Living Together Before Marriage: What Christian Teaching Says
Many churches treat cohabitation as "living in sin" when it involves a sexual relationship, citing passages such as 1 Corinthians 7:2. American believers disagree: Pew found in 2019 that 74% of Catholics accept unmarried couples living together even without plans to marry, compared with 47% of Black Protestants and 35% of white evangelicals.
View the topic →"Flee Fornication": Reading 1 Corinthians 6:18 in Context
"Flee fornication" is the King James wording of 1 Corinthians 6:18, where Paul tells the church at Corinth to run from porneia and argues that this sin, unlike others, is committed against one's own body. The NIV renders it "flee from sexual immorality." The next verse calls the body a temple of the Holy Ghost.
View the topic →What Hebrews 13:4 Says About Marriage, Whoremongers and Adulterers
Hebrews 13:4 states in the King James Version that marriage is honourable and the marriage bed undefiled, and warns that God will judge "whoremongers and adulterers." The Greek word behind "whoremongers," pornos, is also translated "fornicator" elsewhere in the KJV. Christians often cite the verse to argue that sex belongs within marriage.
View the topic →Fornication and the Ten Commandments: What "Thou Shalt Not Commit Adultery" Covers
Not by name. The Ten Commandments say "Thou shalt not commit adultery" (Exodus 20:14), which literally targets marital infidelity. Many churches read it more broadly: Catholic tradition, which counts it as the sixth commandment, says it covers the whole of human sexuality, including fornication. Many Protestants number it seventh.
View the topic →"Saving for the Cause of Fornication": Understanding Matthew 5:32
In Matthew 5:32 Jesus says that a man who divorces his wife causes her to commit adultery, "saving for the cause of fornication." The Greek word is porneia. Readings divide: many Protestant churches see this exception clause as permitting divorce after sexual unfaithfulness, while churches that hold marriage indissoluble, including the Catholic Church, read it far more narrowly.
View the topic →Law
Fornication Laws Still on the Books in the United States
A handful of states still list fornication or unmarried cohabitation as a misdemeanor, including Georgia, South Carolina, North Carolina and Mississippi. These laws are effectively unenforceable for private conduct between consenting adults after Lawrence v. Texas (2003). Several states, among them Utah, Virginia, Idaho and Minnesota, have repealed theirs since 2019.
View the topic →How Lawrence v. Texas Undermined Fornication Laws
Not directly. Lawrence v. Texas (June 26, 2003) struck down a Texas same-sex sodomy law, holding that the Due Process Clause protects private consensual conduct between adults, and overruled Bowers v. Hardwick. Justice Scalia's dissent warned that laws against fornication could not survive this reasoning, and legal commentators now treat such laws as unenforceable.
View the topic →Eisenstadt v. Baird: Contraception, Unmarried Couples and the Fornication Law
In Eisenstadt v. Baird (March 22, 1972), the Supreme Court struck down a Massachusetts law that limited contraceptives to married people, finding it violated equal protection. The Court doubted that deterring fornication, then a misdemeanor in Massachusetts, explained the law, and stated that privacy belongs to the individual, married or single.
View the topic →Griswold v. Connecticut and the Birth of the Right to Privacy
Griswold v. Connecticut (June 7, 1965) struck down a Connecticut ban on contraceptive use by married couples, locating a right of marital privacy in the "penumbras" of the Bill of Rights. Justice Goldberg's concurrence noted that Connecticut separately prohibited adultery and fornication, arguing the state could protect marital fidelity without entering the marital bedroom.
View the topic →Georgia's Fornication Statute and the In re J.M. Ruling
Georgia's code still defines fornication as voluntary intercourse by an unmarried person, punishable as a misdemeanor (O.C.G.A. § 16-6-18). In January 2003, in In re J.M., the Supreme Court of Georgia held that the state constitution's right to privacy bars prosecution for private, unforced, non-commercial sex between people legally able to consent.
View the topic →North Carolina's 1805 Law Against Unmarried Cohabitation
On paper, yes. North Carolina General Statute 14-184, dating to 1805, makes it a Class 2 misdemeanor for an unmarried man and woman to "lewdly and lasciviously associate, bed and cohabit together." Prosecutions are rare, a county superior court judge has ruled it unconstitutional, and lawmakers tabled a repeal bill in 2007.
View the topic →Mississippi's Unlawful Cohabitation Statute Explained
Mississippi Code § 97-29-1 still punishes a man and woman who "unlawfully cohabit, whether in adultery or fornication," with fines up to $500 each and up to six months in county jail. Habitual intercourse can be shown by circumstances. Like similar laws, it is widely considered unenforceable against consenting adults after Lawrence v. Texas.
View the topic →South Carolina's Adultery and Fornication Statutes
South Carolina's code still makes adultery and fornication crimes (§ 16-15-60). Fornication means two unmarried people living together and having intercourse, or having habitual intercourse without living together (§ 16-15-80). The listed penalty is a $100 to $500 fine, six months to a year in prison, or both. The text dates to 1880.
View the topic →How Idaho Repealed Its Fornication and Adultery Laws in 2022
No. Senate Bill 1325, signed on March 22, 2022 and effective July 1, 2022, repealed Idaho Code § 18-6601 (adultery) and § 18-6603 (fornication), along with the crimes-against-nature statute. A state criminal justice subcommittee had concluded in 2021 that both laws were unconstitutional after Lawrence v. Texas. The number 18-6603 now designates a different offense.
View the topic →Virginia's Fornication Law, From Martin v. Ziherl to Repeal
No. In Martin v. Ziherl (January 14, 2005), the Supreme Court of Virginia held the state's fornication statute unconstitutional in a civil suit over a sexually transmitted infection. The law remained in the code, punishable by a fine of up to $250, until House Bill 245 repealed § 18.2-344 in 2020 (Acts 2020, c. 122).
View the topic →Language
What Fornication Means: Everyday, Legal and Biblical Definitions
Fornication means consensual sexual intercourse between two people who are not married to each other. Merriam-Webster traces the English word to the 14th century. In US law it named a misdemeanor, still listed in a few state codes, and in the King James Bible it translates the Greek porneia, a broader term for sexual immorality.
View the topic →From Roman Arches to Sin: The Origin of the Word Fornication
Fornication comes from Late Latin fornicatio, built on fornicari, itself from Latin fornix, an arch or vaulted chamber. In writers such as Horace and Juvenal, fornix came to mean a brothel, possibly because prostitutes worked under arches. The word reached English around 1300 through Old French fornicacion.
View the topic →Fornication or Adultery? How the Two Words Differ
Adultery is sex in which at least one partner is married to someone else; fornication is sex between people not married to each other. South Carolina's code still draws exactly that line. Some older laws turned on the woman's status alone. In the King James Bible, fornication can also be a wider term covering adultery.
View the topic →Fornicators and Whoremongers: Old Words in the King James Bible
In the King James Bible, "fornicator" and "whoremonger" both translate the Greek pornos, used ten times in the New Testament and split evenly between the two English words. The term first meant a male prostitute, then anyone engaging in unlawful sexual intercourse. Hebrews 13:4 warns that God will judge "whoremongers and adulterers."
View the topic →Why Modern Bibles Say "Sexual Immorality" Instead of Fornication
Both render the Greek porneia, which the King James Version translates as "fornication" 26 times. Lexicons define porneia broadly as illicit sexual intercourse, including adultery and incest, and figuratively idolatry. Translations such as the NIV prefer "sexual immorality" to capture that range, as in "flee from sexual immorality" at 1 Corinthians 6:18.
View the topic →What "Living in Sin" Means and Why the Phrase Is Fading
"Living in sin" is an old-fashioned phrase, Merriam-Webster says, for a couple who live together and have sex without being married. It reflects Christian teaching that sex belongs within marriage and echoes old state laws against cohabitation. The phrase has faded as attitudes shifted: in 2019, 69% of Americans accepted unmarried cohabitation.
View the topic →Debunked: "Fornication Under Consent of the King"
No. The acronym story is a modern invention. Etymonline calls acronym explanations of the f-word an "unkillable urban legend" traceable online to 1995. The word is attested in English long before such acronyms were fashionable, with the spelling fukkit in 1503. Fornication itself comes from Latin fornix, an arch.
View the topic →Shotgun Weddings: Meaning and History of an American Expression
A shotgun wedding is a marriage that takes place because the bride is pregnant and the couple feels pressed to marry; Merriam-Webster dates this sense to 1929. The custom has faded as births outside marriage became common: in 2024, 39.5% of US births were to unmarried women, according to the CDC.
View the topic →From "Fornication" to "Premarital Sex": How American Vocabulary Changed
Largely, yes. Cornell's Legal Information Institute notes that what statutes call fornication is now more commonly called premarital sex. The difference is tone: fornication carries legal and biblical weight, while premarital sex is neutral. Surveys follow suit; Gallup asks whether sex between an unmarried man and woman is morally acceptable.
View the topic →"Lewd and Lascivious" and Other Legal Terms in Old Sex Statutes
The phrase comes from statutes such as North Carolina's 1805 law, which punishes an unmarried man and woman who "lewdly and lasciviously associate, bed and cohabit together." Mississippi speaks of unlawful cohabitation, and South Carolina of habitual carnal intercourse. The statutes target an ongoing sexual relationship rather than shared housing; North Carolina's does not reach platonic roommates.
View the topic →History
Fornication in Puritan New England: Crime, Court and Punishment
New England's Puritan colonies treated fornication as a crime under laws drawn largely from Scripture. In Plymouth Colony, records from 1633 to 1643 show 19 fornication convictions, punished by whipping, the stocks, fines or a bond for good behavior. In the 1660s, fornication convictions matched drunkenness convictions in number.
View the topic →Were Scarlet Letters Real? Shaming Punishments in Colonial America
Yes, in some cases. Plymouth Colony law allowed adulterers to be whipped and forced to wear the letters "AD" on their clothing. Nathaniel Hawthorne's The Scarlet Letter (1850) echoes this kind of penalty: Hester Prynne must wear an "A" after bearing a child outside her marriage in Puritan Boston.
View the topic →A History of Fornication Laws in the United States
There was no single date. Fornication laws came from colonial codes and survived statehood: North Carolina's cohabitation statute dates to 1805, Georgia's to an 1833 code and South Carolina's to 1880. Courts and legislatures dismantled them piecemeal. After Lawrence v. Texas (2003), legal scholars consider the remaining statutes unenforceable against consenting adults.
View the topic →Race and Fornication Laws: From Pace v. Alabama to McLaughlin v. Florida
In Pace v. Alabama (January 29, 1883), the Supreme Court upheld an Alabama law punishing interracial adultery or fornication with two to seven years in prison, far more than the ordinary offense. It reasoned both partners received the same penalty. McLaughlin v. Florida (1964) struck down an interracial cohabitation law and rejected Pace's view of equal protection.
View the topic →The Mann Act and Caminetti v. United States: Policing Unmarried Couples
In practice it could. In Caminetti v. United States (January 15, 1917), the Supreme Court held that the Mann Act's ban on interstate transport for an "immoral purpose" covered taking a mistress from Sacramento to Reno, even with no money involved. The current law, 18 U.S.C. § 2421, now refers to prostitution or criminal sexual activity instead.
View the topic →When an Idaho County Prosecuted Teenagers for Fornication
One well-documented case came in 1996, when the Gem County prosecutor in Idaho used a 1921 state fornication law against about half a dozen young people, mainly teenage parents on public assistance. The offense carried up to six months in jail and a $300 fine. Idaho repealed its fornication law in 2022.
View the topic →The Kinsey Reports and Premarital Sex in Postwar America
Alfred Kinsey's Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953), drawn from thousands of interview histories, became bestsellers and reshaped public debate on sexuality, including sex outside marriage. Later federal survey data showed how common it is: 95% of Americans had premarital sex by age 44.
View the topic →Bowers v. Hardwick: The 1986 Ruling That Lawrence Overturned
In Bowers v. Hardwick (June 30, 1986), the Supreme Court upheld Georgia's sodomy law 5-4, finding no constitutional right to the conduct at issue. Georgia's own Supreme Court later read a broader privacy right into the state constitution. In 2003 Lawrence v. Texas expressly overruled Bowers, weakening all laws against private consensual sex.
View the topic →Massachusetts and Fornication: From Bible Commonwealth to Repeal
Yes, for centuries. Early New England criminal law drew heavily on the Old Testament. In 1972 the Supreme Court noted in Eisenstadt v. Baird that fornication was still a Massachusetts misdemeanor, carrying a thirty-dollar fine or three months in jail. It was repealed in 2018, the same year as the state's adultery statute.
View the topic →Utah's 1973 Fornication Law and Its 2019 Repeal
Utah repealed Code § 76-7-104, its 1973 law making sex between unmarried people a class B misdemeanor, through Senate Bill 43 in 2019. The House passed it 41-32 and Governor Gary Herbert signed it in March 2019; the repeal took effect May 14, 2019. A separate earlier bill had already decriminalized adultery and sodomy between consenting adults.
View the topic →Society
How Many Americans Have Sex Before Marriage? What the Data Show
Nearly all. A 2007 study of the National Survey of Family Growth found that by age 44, 95% of Americans had had premarital sex, including 94% of women and 96% of men. Only about 3% of respondents had abstained until marriage. By age 20, 75% had already had premarital sex.
View the topic →Is Sex Outside Marriage Morally Acceptable? American Opinion Over Time
In Gallup's May 2026 poll, 65% of Americans said sex between an unmarried man and woman is morally acceptable and 31% called it wrong. Acceptance rose from 53% in 2001 to a peak of 76% in 2022, then slipped. Religion matters most: Pew found white evangelicals far less accepting than the unaffiliated.
View the topic →Cohabitation in America: More Common Than Marriage for Young Adults
Cohabitation is now a more common experience than marriage among younger adults. Pew reported in 2019 that 59% of Americans aged 18 to 44 had lived with an unmarried partner, while 50% had ever married. People also marry later: the Census Bureau put the median age at first marriage at 30.2 for men and 28.6 for women in 2024.
View the topic →Purity Culture in America: Pledges, Rings and Their Critics
Purity culture is a movement within American evangelicalism that urged young people to pledge sexual abstinence until marriage, often with rings or signed cards. True Love Waits, a Lifeway campaign, began with students in the Nashville area. A 2009 study found pledgers no less likely than matched peers to have premarital sex, but less likely to use contraception.
View the topic →Abstinence-Only Education: Federal Funding and State Rules
Yes. Section 510 of the Social Security Act, 42 U.S.C. § 710, funds "sexual risk avoidance education" at $75 million a year from fiscal 2018 through 2026. Programs must present avoiding nonmarital sexual activity as the optimal health behavior. At state level, 43 states and DC require sex or HIV education to cover or stress abstinence, per Guttmacher's 2025 data.
View the topic →Births Outside Marriage in the US: Numbers and Changing Views
In 2024, 39.5% of US births were to unmarried women, about 1.43 million babies, according to the CDC's National Center for Health Statistics. Opinion has shifted too, if unevenly: in Gallup's 2026 poll, 58% of Americans called having a baby outside marriage morally acceptable, down from 67% a year earlier.
View the topic →Faith and Sex Outside Marriage: How US Religious Groups Differ
Views vary widely by faith. In Pew's 2019 survey, 79% of religiously unaffiliated adults said sex between unmarried adults in a committed relationship is sometimes or always acceptable, compared with 67% of mainline Protestants, 64% of Catholics, 57% of historically Black Protestants and 46% of evangelicals. Frequent churchgoers were least accepting.
View the topic →Chastity Rules at Religious Colleges: BYU's Honor Code and Beyond
The Church Educational System Honor Code, which governs Brigham Young University, asks students to "live a chaste and virtuous life," defined as abstaining from sexual relations outside a marriage between a man and a woman. It mirrors the Latter-day Saint law of chastity, which the Church describes as having no sexual relations outside a legal marriage.
View the topic →Can Unmarried Couples Share a Hotel Room? North Carolina's Odd Law
Not in practice, but one statute remains. North Carolina General Statute 14-186, dating to 1917, makes it a Class 2 misdemeanor for a man and woman to occupy the same hotel bedroom "for any immoral purpose" or to register falsely as husband and wife. Such laws are considered unenforceable for consenting adults after Lawrence v. Texas.
View the topic →Later Marriage, Longer Singlehood: What It Means for Sex Before Marriage
In 2024 the median age at first marriage in the United States was about 30.2 for men and 28.6 for women, up from 23.1 and 21.1 in 1974, according to the Census Bureau. Since federal survey data show about three in four Americans have had sex by age 20, most spend years as sexually active unmarried adults.
View the topic →Culture
Sin and Shame in The Scarlet Letter: Hawthorne's Puritan Boston
Nathaniel Hawthorne's 1850 novel The Scarlet Letter follows Hester Prynne, a married woman in 17th-century Puritan Boston who bears a child outside her marriage and is forced to wear a scarlet "A." Britannica calls it a classic moral study. Hawthorne drew on real colonial practice: Plymouth Colony could make adulterers wear the letters "AD."
View the topic →Adultery and Reputation in Arthur Miller's The Crucible
Arthur Miller's 1953 play The Crucible dramatizes the 1692 Salem witch trials, in which 19 people were hanged, as an allegory of McCarthy-era anti-communist hunts. Its plot turns on John Proctor's past affair with Abigail Williams: that hidden episode feeds her accusations and forces him to choose between confession and his good name.
View the topic →Easy A and the Scarlet Letter in American Teen Culture
Easy A, a 2010 comedy starring Emma Stone as high-school student Olive, borrows the plot device of The Scarlet Letter. A false rumor about Olive's sex life spreads through school, a self-appointed religious leader tries to shame her, and Olive takes ownership of her reputation, echoing Hester Prynne's scarlet "A" in a modern setting.
View the topic →How the Hays Code Kept Sex Outside Marriage Off the Screen
The Motion Picture Production Code, known as the Hays Code, was Hollywood's self-imposed rulebook from 1934 to 1968. Adopted partly in response to public outrage and the threat of government censorship, it barred depictions of promiscuity, profanity and obscenity, among other content. The current film rating system replaced it in 1968.
View the topic →The Oneida Community and Its "Complex Marriage" Experiment
The Oneida Community was a religious utopian society led by John Humphrey Noyes, which grew from a group he formed in Putney, Vermont, around 1841 and lived at Oneida, New York, from 1848 to 1880. It practiced "complex marriage," rejecting exclusive couples, which set it sharply apart from the marriage norms and laws of its time.
View the topic →The Bible Belt and Sexual Morality in the American South
The Bible Belt is a mainly Southern US region associated with fundamentalist Protestantism; Merriam-Webster dates the term to 1924. Several states still carrying fornication or cohabitation laws lie there. Attitudes track faith: Pew found in 2019 that 35% of white evangelicals accept unmarried couples living together without plans to marry.
View the topic →Are Americans Puritanical About Sex? The Stereotype and the Evidence
"Puritanical," meaning rigidly moral, recalls the Puritans who settled New England from 1630 and based criminal law largely on the Old Testament. The label survives in debates over sex ed, film ratings and morals laws. Yet surveys complicate it: Gallup found in 2026 that 65% of Americans call sex between unmarried adults morally acceptable.
View the topic →Fact-Checking Viral Lists of "Weird Sex Laws" in America
Some are, many are not. A widely shared 2021 list named Idaho, Illinois, Massachusetts, Mississippi, South Carolina and Utah as banning sex outside marriage, but Massachusetts reportedly repealed its law in 2018, Utah in 2019 and Idaho in 2022. Statutes that remain, as in Mississippi and South Carolina, are considered unenforceable after Lawrence v. Texas.
View the topic →Why Americans Still Say "Fornication": The King James Bible's Legacy
Largely because of the King James Version, published in 1611 under James I and the standard English Bible from the mid-17th to the early 20th century. It renders the Greek porneia as "fornication" 26 times, in lines such as "Flee fornication." Many American churches still read the KJV, keeping the word alive.
View the topic →Alfred Kinsey in Pop Culture: From 1950s Celebrity to Hollywood Biopic
Alfred Kinsey's books on male (1948) and female (1953) sexual behavior became bestsellers and made the Indiana University biologist a public celebrity, featured in cartoons, novels and popular music. His reports challenged official morality about sex outside marriage. Hollywood later retold his life in the biopic Kinsey, with Liam Neeson in the title role.
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