Krumbum this will go nowhere if you think the Bible is not true. I believe it is true.
The whole discussion is worthless if we do not have a common set of principles from which to argue. If you're arguing from the harm principle and sec-hum values, you will not meet me halfway when I argue from faith.
Please, everyone. I have done serious debates with serious and respectful Christians, some who I would count as friends, who disagree that the moral requirement for sex to be within a heterosexual marriage a)ever existed or b)still applies today. I will NOT get into the "same old, same old" questions about Leviticus and putting-to-death and why not mixed fibres or shellfish and "Jesus taught love" and "don't judge" and people asking me to prove "my" "god".
I have better things to do with my time than answer these sort of questions. Read theology if you want to know why the Bible is accepted by a huge swathe of theologians across the Church to condemn acts of sex between two men or two women.
Or if you're an atheist then don't bother. But I am a Christian, and I have heard it all before about "prove it" etc. Repeating myself on these issues is tiresome.
Finally, I do not consider it disrespectful to call a relationship "immoral" when it is according to Scripture, or to block "adults" sleeping together. Being an adult does not give you ANY moral right to share anyone's bed on their private residential property. It is as simple as that. If you want discrimination-free rooms to have sex in, try a hotel or B&B, now our meddling government has barred all owners of such establishments from making up their own minds on whether to admit gays. Personally I don't believe that a hotel/B&B owner should raise moral objections to what is being done in the rooms people have paid for; he is providing a service. Yet I am dismayed that Cameron and his "conservative" government have not overturned the Equality Act so people who think differently on this can run their businesses in accordance with principle.