Legality of Adultery by Country
In the U.S. military, adultery is a potential court martial offence that falls under the general section (s. 134).  The Handbook of Trials Martial defines (para. 99) “extramarital sexual conduct” as follows: “elements. 1. the accused has unlawfully engaged in extramarital acts within the meaning of point (c.2) with a particular person; 2. that the defendant knew at that time that the defendant or the other person was married to someone else; and (3) that the respondent`s conduct in the circumstances was either: (i) prejudicial to good order and discipline in the armed forces; (ii) was likely to discredit the armed forces; or (iii) may undermine good order and discipline in the armed forces and bring them into disrepute.  As such, extramarital sex is not automatically a criminal offence, it must be conducted in circumstances that adversely affect the military. The adultery law was revised in 2019 to include same-sex encounters in the crime.  State anti-adultery laws are rarely enforced, a relic of our country`s Puritan beginnings, says Naomi Cahn, a law professor at George Washington University School of Law. The United Nations Working Group on Discrimination against Women in Law and Practice is deeply concerned about the criminalization and punishment of adultery, the application of which leads to discrimination and violence against women. Other Hindu texts present a more complex pattern of behavior and mythology in which gods commit adultery for various reasons.
For example, Krishna commits adultery and the Bhagavata Purana justifies it as something to be expected when Vishnu takes human form, just as the sages become uncontrolled.  According to Tracy Coleman, Radha and other Gopis are indeed Krishna lovers, but this is prema or “selfless and true love” and not a carnal desire. In Hindu texts, this relationship between Gopis and Krishna involves a secret nocturnal rendezvous. Some texts speak of divine adultery, others as a symbol of spiritual devotion and religious value.  The example of Krishna`s adulterous behavior was used by Sahajiya Hindus in Bengal to justify their own behavior, which contradicts the prevailing Hindu norm, according to Doniger.  Other Hindu texts assert that Krishna`s adultery is not a license for other men to do the same, just as men should not drink poison simply because Rudra-Shiva drank poison during Samudra Manthan.  A similar teaching is found in Mahayana Buddhism, says Doniger.  The Code of Hammurabi, a well-preserved Babylonian law from ancient Mesopotamia dating from around 1772 BC. AD, provided for drowning as a punishment for adultery.  Elsewhere in East Asia, adultery remains illegal in Taiwan and the Philippines. According to Werner Menski, Sanskrit texts take “very different positions on adultery”, some considering it a minor crime that can be treated with repentance, but others treating it as a serious offense that deserves the death penalty for the man or the woman, depending on the caste.  According to Ramanathan and Weerakoon, in Hinduism, sexual matters are left to the judgment of the parties involved and are not prescribed by law.
 The country that gave us the original female man Giacomo Casanova, famous for sleeping hundreds of women, has a strong claim to third place in the world ranking. Italy also voted for Silvio Berlusconi, known for both his bunga-bunga parties and his politics. There are some differences between Buddhist and Hindu texts on the identification and consequences of adultery. According to José Ignacio Cabezón, for example, the Hindu Naradasmriti text does not consider consensual extramarital sexual relations between a man and a woman as a punishable crime in certain circumstances (for example, when the husband has left the wife), but Buddhist texts nowhere exonerate an adulterous relationship. The term adultery in Naradasmriti is broader than that of Buddhist sources. In the text, various acts such as secret meetings, exchange of messages and gifts, “inappropriate touching” and a false accusation of adultery are considered adultery, while Buddhist texts do not recognize these acts as adultery.  Later texts such as the Dhammapada, the Pancasiksanusamsa Sutra, and some Mahayana sutras claim that “careless people who run after other men`s wives” gain merit, guilt, and discomfort and are reborn in hell.  Other Buddhist texts do not mention legal sanctions for adultery.
 According to New Europe magazine, an advisor to the Belgian dating site Gleeden says cheating is no longer taboo in the country. “It is no longer an `injustice` that allows the aggrieved party to request separation on the basis of the injustice of the infidels,” she said. State criminal laws against adultery are rarely enforced. Federal appellate courts have ruled adversarially on the unconstitutionality of these laws (particularly after the 2003 Supreme Court decision Lawrence v. Texas), and in 2019, the Supreme Court did not rule directly on this issue.  Judaism and Christianity base their position on adultery on passages in the Hebrew Bible (Old Testament in Christianity), which first forbids adultery in the seventh commandment: “Thou shalt not commit adultery.” (Exodus 20:12). Leviticus 20:10 then prescribes the death penalty for adultery, but refers to adultery between a man and a married woman: There is concern that the existence of “adultery” as a criminal offence (and even in family law) may affect criminal procedure in cases of domestic violence and murder, particularly by mitigating murder to manslaughter.  or otherwise providing evidence of a partial or full defence in cases of violence. These concerns have been formally expressed in recent years by the Council of Europe and the United Nations. Recommendation Rec(2002)5 of the Committee of Ministers of the Council of Europe to member states on the protection of women against violence states: (…) “57. exclude adultery as an excuse for violence within the family.”  UN Women has also stated with respect to the defense against provocation and other similar defenses that “laws should make it clear that these defenses do not include or enforce honor killings, adultery, domestic violence, or murder.”  In the manner of Marie Kondo, some states are beginning to “clean up” their penal codes by removing from law books crimes that “no longer cause joy.” Specifically, Utah, Massachusetts, Minnesota, and Virginia have all proposed laws to remove the crime of adultery and fornication from their law books.
Utah`s bill has just been signed into law by the governor, and Massachusetts, Minnesota and Virginia all have legislation at varying levels of committee purgatory. The laws of Massachusetts and Minnesota seem to at least have a chance. Unlike other countries on this list, Saudi Arabia regularly applies the death penalty. According to Amnesty International, it has the third highest number of executions per year. At least one execution for adultery has been recorded in the country in recent years, although the majority of death sentences have been for murder or drug-related offences. Historically, in most cultures, anti-adultery laws were enacted only to prevent women – not men – from having sex with anyone other than their spouse, with adultery often defined as sexual intercourse between a married woman and a man other than her husband. [ref. needed] In many cultures, the penalty was and still is the death penalty, as mentioned below. At the same time, men are free to have sex with all women (polygamy), unless the wives already have husbands or “landlords”. In fact, בעל (ba`al), Hebrew for husband used throughout the Bible, is synonymous with owner. These laws were enacted out of fear of cuckolding and therefore sexual jealousy.
Many indigenous customs, such as female genital mutilation and even the menstrual taboo, have been theorized as preventive measures against the cuckold. This arrangement has been deplored by many modern intellectuals. As of 2021, adultery is a criminal offense in 17 states, but prosecutions are rare.   Pennsylvania abolished its laws against fornication and adultery in 1973.  States that have decriminalized adultery in recent years include West Virginia (2010), Colorado (2013), New Hampshire (2014), Massachusetts (2018), and Utah (2019).  The last conviction for adultery in Massachusetts in 1983 stated that the law was constitutional and that “no fundamental personality rights implicit in the concept of ordained liberty guaranteed by the Constitution of the United States preclude the prosecution of such [adulterous] persons.”  In common law countries, adultery was also known as criminal conversation. It became the name of the civil offense resulting from adultery and based on compensation for harm to the other spouse.  Criminal conversations were usually referred to as Crim.
It was abolished in England in 1857 and in the Republic of Ireland in 1976.