Here are at least four primary s*xual sins the Word of God speaks of: adultery, fornication, uncleanness and lewdness.
Here are the definitions of these four s*xual sins:
1- Adultery: Unlawful s*xual intercourse involving at least one married person. Adultery is incompatible with the harmonious laws of family life in God’s kingdom, and is under God’s judgment since it violates God’s original purpose.
2- Fornication: P****graphy, illicit s*xual intercourse including prostitution, whoredom, inc*st, licentiousness (lack of moral restraint), and habitual immorality (would include s*xual fantasies that lead to self service).
3- Uncleanness: Often refers to homosexuality and lesbianism
4- Lewdness: Unashamed indecency, unbridled lust, unrestrained depravity (a disposition or settled tendency to evil, the innate corruption of unregenerate man), the person with this characteristic has an insolent defiance of public opinion, sinning in broad daylight with arrogance and contempt. Again, this often refers to s*xual sin.
Source: Information Nigeria