Avoid sexual immoralities like pornography, masturbation, fornication, adultery, rape, polygamy, homosexuality, lesbianism, bestiality, prostitution, etc.
“None of you shall approach to any that is near of kin to him, to uncouer their nakedness: I am the Lord. The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncouer: she is thy mother, thou shalt not uncouer her nakedness. The nakedness of thy father’s wife shalt thou not uncouer: it is thy father’s nakedness. The nakedness of thy sister, the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, euen their nakedness thou shalt not uncouer. The nakedness of thy son’s daughter, or of thy daughter’s daughter, even their nakedness thou shalt not uncouer: for theirs is thine own nakedness. The nakedness of thy father’s wive’s daughter, begotten of thy father, (she is thy sister,) thou shalt not uncouer her nakedness. Thou shalt not uncouer the nakedness of thy father’s sister: she is thy father’s near kinswoman. Thou shalt not uncouer the nakedness of thy mother’s sister: for she is thy mother’s near kinswoman. Thou shalt not uncouer the nakedness of thy father’s brother, thou shalt not approach to his wife: she is thine aunt. Thou shalt not uncouer the nakedness of thy daughter in law: she is thy son’s wife, thou shalt not uncouer her nakedness. Thou shalt not uncouer the nakedness of thy brother’s wife: it is thy brother’s nakedness. Thou shalt not uncouer the nakedness of a woman and her daughter, neither shalt thou take her son’s daughter, or her daughter’s daughter, to uncouer her nakedness: For they are her near kinswomen: it is wickedness. Neither shalt thou take a wife to her sister, to vex her, to uncouer her nakedness besides the other, in her life time. Also thou shalt not approach unto a woman to uncouer her nakedness, as long as she is put apart for her uncleanness. Moreover, thou shalt not lie carnally with thy neighbour’s wife, to defile thy self with her.” – Leviticus 18: 6-20
“Thou shalt not lie with mankind, as with womankind: it is abomination. Neither shalt thou lie with any beast, to defile thy self therewith: neither shall any woman stand before a beast to lie down thereto: It is confusion. Defile not you your selves in any of these things: for in all these, the nations are defiled which I cast out before you. And the land is defiled: Therefore I do visit the iniquities thereof upon it, and the land itself vomiteth out her inhabitants.” – Leviticus 6: 22-25
“There shall be no whore of the daughters of Israel, nor a sodomite of the sons of Israel. Thou shalt not bring the hire of a whore, or the price of a dog, into the house of the Lord thy God for any vow: for even both these are abomination unto the Lord thy God.” – Deuteronomy 23: 17-18
