|What Jesus taught
When Jesus was asked questions about marriage he went straight back to the defining passages in Genesis that say that marriage is between male and female and is meant to be life long. He saw the creation accounts in Genesis as authoritative in His day. And what is authoritative for Jesus is authoritative for Christians also. While Jesus did not specifically teach on homosexuality, His establishment of the Genesis passages as the fundamental passages on marriage (even more fundamental than the Law) leaves no doubt as to the outcome.
And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female, Matthew 19:4 (KJV)
"But from the beginning of the creation, God 'made them male and female.'"
- Mark 10:6 (KJV)
What else does the Bible say?
26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet. -Romans 1:26-27 (KJV)
9 Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,
10 Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God. 1 Corinthians 6:9-10 (KJV)
9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
10 For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine; 1 Timothy 1:9-10 (KJ)
The Deadly and Dangerous Homosexual "Lifestyle"