To be joined together

Male and female, made for each other, bonding together for a purpose. Whether you believe that Jesus Christ is the Son of God, that he was a philosopher or just a perceptive Rabbi, this is the definition of marriage most people understand:

³ Some Pharisees came to him to test him. They asked, “Is it lawful for a man to divorce his wife for any and every reason?”

⁴ “Haven’t you read,” he replied, “that at the beginning the Creator ‘made them male and female,’^{[a] 5} 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’^[b]? ⁶ So they are no longer two, but one flesh. Therefore what God has joined together, let no one separate.” Matthew 19: 3-6. 
Footnotes: [a] Matthew 19:4 Gen. 1:27 [b] Matthew 19:5 Gen. 2:24

Joining together male and female is what defines marriage, be it metal, wood or human flesh. Two males or two females may 'bond' in terms of human affection but so does a mother and her child or a person may express love for their pet but that does not, indeed can not, lead to marriage. Claims that same sex couples are discriminated against because they are not allowed to marry are absurd. They have equal rights under civil partnership legislation which puts them on equal basis with heterosexual couples but by definition they cannot be joined together in marriage. Some have suggested that if they were allowed to marry their union would be no different to the union of a heterosexual couple unable to have children. That is as bogus as it is unkind. But it goes further than that. The 'want it all' mentality extends to same sex couples expecting to have children by one means or another regardless of the cost to the child or the claimed heartbreak because a child 'has no mother' when clearly he must have.

Manipulation is the name of the game. This article lists the six ways homosexual activists manipulate public opinion:

• Exploit the “victim” status;
• Use the sympathetic media;
• Confuse and neutralize the churches;
• Slander and stereotype Christians;
• Bait and switch (hide their true nature); and
• Intimidation.

The Anglican church knows all about 'Confuse and neutralize the churches' and 'Slander and stereotype Christians', particularly in England and Wales where US liberalism has spread like a rash losing the bond of trust that existed in our once broad church. Remember how traditionalists were promised an honoured place in the church, how civil partnerships didn't mean gay marriage? No more. Tolerance of minorities has become intolerance by minorities but whatever they say, they cannot redefine what it means is to be male and female.  

You don't have to be religious to oppose same-sex marriage, just rational.