Sex is for marriage, i belive this because i belive in the God of the Bible who created sex and marriage to go together. I honestly wish i could say i abstained until marriage. Sex is a wonderful thing created by God, it should not to be abused - the results of its abuse can be seen throughout much of the world (children brought up fatherless/motherless, abortion, STD's, sex adictions, pornography etc)
Jesus put it all into perspective when he condemed even lust.
But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart. Matthew 5:28
God made marriage for male and female, as Jesus makes clear in the following..
"Haven't you read," he replied, "that at the beginning the Creator 'made them male and female,' and said, 'For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh'? So they are no longer two, but one. Therefore what God has joined together, let man not separate." Matthew 19:4-6
If gay marriage it is outside the bounds God set up for marriage then how can they expect God to honor it? and besides
'Do not lie with a man as one lies with a woman; that is detestable. Leviticus 18:22