Unmarried couples who live together and “lewdly associate” with one another may face up to a year in prison.

61-8-4. Lewd and lascivious cohabitation and conduct; penalty; when persons presumed to be unmarried. If any persons, not married to each other, lewdly and lasciviously associate and cohabit together, or, whether married or not, be guilty of open or gross lewdness and lasciviousness, they shall be guilty of a misdemeanor, and, upon conviction, shall be…

Unnatural intercourse, if both parties voluntarily participate, results in a maximum sentence of 10 years and $10,000.

97-29-59. Unnatural intercourse. Every person who shall be convicted of the detestable and abominable crime against nature committed with mankind or with a beast, shall be punished by imprisonment in the penitentiary for a term of not more than ten years.

Adultery or Fornication results in a fine of $500 and/or 6 months in prison.

97-29-1. Adultery and fornication; unlawful cohabitation. If any man and woman shall unlawfully cohabit, whether in adultery or fornication, they shall be fined in any sum not more than five hundred dollars each, and imprisoned in the county jail not more than six months; and it shall not be necessary, to constitute the offense, that…