You are comparing the same thing you are free to enjoy with your wife - sex and marriage - to all kinds of harmful, abusive, base behaviours. You seek to deny the right of two men or two women to declare and fulfil their love for one another in the name of the God of love. Do you not think that if this God exists then he is present in their love?
Rhi (and NS, for that matter), I am not comparing same-sex sex to heterosexual sex at all. As someone who believes that humanity has been created with specific purposes in the mind of the Creator, I believe that same-sex sex runs counter to those purposes, in much the same way that things like illness, wrongdoing and disabilities - especially genetic ones - run counter to those purposes.
NS is determined that I should be seen as comparing behaviour X with behaviour Y by having them in the same list; when I mention you, Susan D, Gonners, NS, Shaker, Alien, Jim, Judder, Johnny Canoe, KO and, say, Humph in a list, am I necessarily comparing you all?
So where is your love? When you are judged (as you believe you one day will be) do you not think it better to stand before your God and say that you allowed gay relationships out of love than criminalised them in your mind out of devotion to some words in a book? The Bible's a book, Hope. It's man-made. And using it to condemn gay relationships is idolatry.
Love also challenges people and their behaviour - its called discipline and is just as much a part of love as the 'warm and cuddly' stuff that you are referring to here.
As for doing anything 'out of devotion to some words in a book', you seem to misunderstand Christianity. 'The book' has its value, in that it gives one guidelines as to how to understand the world, but - as you will be aware - different people interpret it in different ways. You get liberal theology from S. America which highlights the parts that refer to God's love for the poor, to prosperity theology from the States that highlights God's love for the wealthy and a host of 'theologies' in between. My relationship isn't with a set of printed material; it is with the Creator of this world.