Kwayera, here are some of the passages.
Marriage:
- The first man was Adam and the first women was Eve. They were married, in first human marriage, conducted by God. This model marriage, was between one man and one women.
Gen. 2:18, 21-24 (NIV)
The LORD God said, "It is not good for the man to be alone. I will make a helper suitable for him."
So the LORD God caused the man to fall into a deep sleep; and while he was sleeping, he took one of the man's ribs and closed up the place with flesh. Then the LORD God made a woman from the rib he had taken out of the man, and he brought her to the man. The man said, "This is now bone of my bones and flesh of my flesh; she shall be called 'woman,' for she was taken out of man." For this reason a man will leave his father and mother and be united to his wife, and they will become one flesh.
- Various passages relating to (ideal) marriage (God's plan for it etc.) always (as far as I am aware) refer to a wife and a husband (for example NIV, 1 Peter 3:1-5 etc refers to wives and husbands).
Ok, I’m not going to quote every passage that refers to marriage in this sense, because there are quite a few.
1 Peter 3:1-2 (NIV)
Wives, in the same way be submissive to your husbands so that, if any of them do not believe the word, they may be won over without words by the behaviour of their wives, when they see the purity and reverence of your lives.
- There is no mention of homosexual unions, or homosexual marriage at all. As such it is neither expressly described as good or bad, it is ignored.
Sexual Practises:
- Sex outside of marriage is immoral (among other rules etc. - you're prob familiar with them anyway).
Some verses relate to sex outside of marriage (otherwise known as "fornication"), others relate to adultery, bestiality and group sex as well as a few other immorals.
I Corinthians 7:2 (NIV)
But since there is so much immorality, each man should have his own wife, and each woman her own husband.
- The only form of sex which would appear moral, is between one man and one women, within marriage.
Hebrews 13:4 (NIV)
Marriage should be honored by all, and the marriage bed kept pure, for God will judge the adulterer and all the sexually immoral.
- Homosexuality (or to be specific, homosexual lust and homosexual sex) are condemned throughout.
There many Bible verse which condemn homosexuality, here are two.
(The somewhat infamous) Leviticus 18:22 (NIV)
Do not lie with a man as one lies with a woman; that is detestable.
1 Timothy 1:8-11 (NLT)
We know that the law is good when used correctly. For the law was not intended for people who do what is right. It is for people who are lawless and rebellious, who are ungodly and sinful, who consider nothing sacred and defile what is holy, who kill their father or mother or commit other murders. The law is for people who are sexually immoral, or who practice homosexuality, or are slave traders, liars, promise breakers, or who do anything else that contradicts the wholesome teaching that comes from the glorious Good News entrusted to me by our blessed God.