Forbidden Acts of Immorality According to Biblical Laws

The following is a list of various acts of  sexual immorality which the Lord absolutely forbids people to do.

The Bible tells us specifically what acts are considered immoral and are forbidden by the Lord.
Lev. Chapter 18
And the Lord spake unto Moses, saying, Lev. 18:1
Speak unto the children of Israel, and say unto them, I am the Lord your God. Lev. 18:2
After the doings of the land of Egypt, wherein ye dwelt, shall ye not do: and after the doings of the land of Canaan, whither I bring you, shall ye not do: neither shall ye walk in their ordinances. Lev. 18:3
Ye shall do my judgments, and keep mine ordinances, to walk therein: I am the Lord you God. Lev. 18:4
Ye shall therefore keep my statutes, and my judgments: which if a man do, he shall live in them: I am the Lord. Lev. 18:5
Forbidden to uncover the nakedness of close relatives
None of you shall approach to any that is near of kin to him, to uncover their nakedness: I am the Lord. Lev. 18:6
No immorality allowed with father or mother
The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness Lev. 18:7
No immorality with step mother's 
The nakedness of they father's wife shalt thou not uncover: it is thy father's nakedness. Lev. 18:8
No immorality with sisters, whether they be the daughter of your father or mother
The nakedness of thy sister the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, even their nakedness thou shalt not uncover. Lev. 18:9
No immorality with Grandchildren
The nakedness of thy son's daughter, or of thy daughter's daughter, even their nakedness thou shalt not uncover: for theirs is thine own nakedness. Lev.18:10
No immorality with half sisters
The nakedness of thy father's wife's daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness. Lev. 18:11
No immorality with Aunts
Aunt's on father's side:
Thou shalt not uncover the nakedness of thy father's sister: she is thy father's near kinswoman. Lev. 18:12
Aunts on mother's side:
Thou shalt not uncover the nakedness of thy mother's sister: for she is thy mother's near kinswoman. Lev. 18:13
No immorality with Uncles or Uncle's Wife
Thou shalt not uncover the nakedness of thy father's brother, thou shalt not approach to his wife; she is thy aunt. Lev. 18:14
No immorality with daughter-in-laws
Thou shalt not uncover the nakedness of thy daughter-in-law: she is thy son's wife; thou shalt not uncover her nakedness. Lev. 18:15
No immorality with brother's wives
Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness. Lev. 18:16
No immorality with a woman and her daughter nor her daughter or son's daughter
Thou shalt not uncover the nakedness of a woman and her daughter, neither shalt thou take her son's daughter, or her daughter's daughter, to uncover her nakedness for they are her near kinswomen: it is wickedness. Lev. 18:17
No marriage or immorality to sisters during their lifetime
Neither shalt thou take a wife to her sister, to vex her, to uncover her nakedness, beside the other in her life time. Lev. 17:18
No sex during  a woman's menstrual cycle
Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for uncleanness. Lev. 18:19
No sex with the neighbor's wife
Moreover thou shalt not lie carnally with thy neighbor's wife, to defile thyself with her.  Lev. 18:20
Do not teach children-Pagan Rituals
No seed (could refer to children or sperm) to pass through the fires of Molech (pagan ritual which may have burned children). The Lord stresses His point here about the worship of pagan gods saying, "neither shalt thou profane the name of thy God: I am the Lord"
And thou shalt not let any of thy seed pass through the fire to Molech; neither shalt thou profane the name of thy God: I am the Lord.. Lev. 18:21
No Homosexuality (immoral acts between same sexes)
Thou shalt not lie with mankind, as with womankind: it is an abomination. Lev. 13:22
No Beastality (immoral acts with animals)
Neither shalt thou lie with an beast to defile thyself therewith: neither shall any woman stand before a beast to lie down thereto: it is confusion. Lev. 18:23
The Lord has cast people out for the previous mentioned immoral acts before
Defile not ye yourselves in any of these things: for in all these the nations are defiled which I cast out before you. Lev. 18:24
Immorality defiles the land
And the land is defiled: therefore I do visit the iniquity thereof upon it, and the land itself vomiteth out her inhabitants. Lev. 18:25
​Ye shall therefore keep my statutes and my judgments, and shall not commit any of these abominations; neither any of your own nation, nor any stranger that sojourneth among you. Lev. 18:26
Warning from the Lord to those who commit the previous immoralities
The previous mentioned immoralities have been done before and they defiled the land due to their heinous acts.
(For all these abominations have the men of the land done, which were before you, and the land is defiled;) Lev. 18:27
The land will spew you out if you do these immoralities
That the land spew not you out also, when ye defile it, as it spewed out the nations that were before you. Lev. 18:28
Whoever commits these abominations will be cut off from their people
For whosoever shall commit any of these abominations, even the souls that commit them shall be cut off from among their people. Lev. 18:29
Keep the Lord's ordinance, do not commit these abominable customs that defile you warns the Lord 
Therefore shall ye keep mine ordinance., that ye commit not any one of these abominable customs, which were committed before you, and that ye defile not yourselves therein: I am the Lord your God. Lev. 18:30

---

Memory Verse

Ye shall therefore keep my statutes, and my judgments: which if a man do, he shall live in them: I am the Lord. Lev. 18:5

---

More About Biblical Laws