Bible also contains some views aboutsex and marriage.

Hebrews chapter 13
Give honor to marriage, and remain faithful to one another in marriage. God will surely judge people who are immoral and those who commit adultery.

Book of Proverbs
Proverbs chapter 22
Adultery is a trap-it catches those with whom the Lord is angry.

The Bible says that Jesus Christ said:
Matthew chapter 5
"You have heard that the law of Moses says, 'Do not commit adultery.' But I say, anyone who even looks at a woman with lust in his eye has already committed adultery with her in his heart. So if your eye - even if it is your good eye - causes you to lust, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. And if your hand - even if it is your stronger hand - causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell.

"You have heard that the law of Moses says, 'A man can divorce his wife by merely giving her a letter of divorce.' But I say that a man who divorces his wife, unless she has been unfaithful, causes her to commit adultery. And anyone who marries a divorced woman commits adultery."

The Old Testament in the Bible says:
Leviticus chapter 18

The LORD spoke to Moses, "Tell the Israelites: I am the LORD your God. Follow my rules, and live by my standards. You will have life through them. I am the LORD.

* "Never have sexual intercourse with anyone related to you by blood. I am the LORD."
* "Never have sexual intercourse with your mother. She is your own mother. Never have sexual intercourse with her."
* "Never have sexual intercourse with your stepmother. She is related to you through your father."
* "Never have sexual intercourse with your stepsister, whether she is your father's daughter or your mother's daughter. It makes no difference whether or not she was born in your house."
* "Never have sexual intercourse with your granddaughter, whether she is your son's daughter or your daughter's daughter, because she is related to you."
* "Never have sexual intercourse with a daughter of your father and his wife. She is your own sister."
* "Never have sexual intercourse with your father's sister. She is your paternal aunt."
* "Never have sexual intercourse with your mother's sister. She is your maternal aunt."
* "Never have sexual intercourse with the wife of your father's brother. She, too, is your aunt."
* "Never have sexual intercourse with your daughter-in-law. She is your son's wife. Never have sexual intercourse with her."
* "Never have sexual intercourse with your sister-in-law. She is your brother's wife."
* "Never have sexual intercourse with a woman and her daughter or a woman and her granddaughter. They are related. Doing this is perverted."
* "While your wife is living, never marry her sister as a rival wife and have sexual intercourse with her."
* "Never have sexual intercourse with your neighbor's wife and become unclean with her."
* "Never have sexual intercourse with a man as with a woman. It is disgusting."
* "Never have sexual intercourse with any animal and become unclean with it. A woman must never offer herself to an animal for sexual intercourse. It is unnatural."