The following discussion is about the Adam and Steve argument.
The passage this argument from Conservative fundamentalist literalist Christians comes from Genesis 1:26,27 and Genesis 2:18, 20-24 from the King James Version.
 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
 So God created man in his own image, in the image of God created he him; male and female created he them.
 And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
 And Adam gave names to all cattle, and to the fowl of the air, and to every beast of the field; but for Adam there was not found an help meet for him.
 And the LORD God caused a deep sleep to fall upon Adam and he slept: and he took one of his ribs, and closed up the flesh instead thereof;
 And the rib, which the LORD God had taken from man, made he a woman, and brought her unto the man.
 And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man.
 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
The argument most use with this set of scripture is this: Since God did not create Adam and Steve then homosexuality is a sin and immoral. This is a completely illogical argument based on the scripture we have just looked at above. Since the bible does not mention what other types of relationships are moral or immoral, then any that are not described are wrong.
If I did not describe to my child what is expected from him in good behavior, how can I expect him to act. It is not right to punish him for something I did not mention. I usually use such examples to teach him proper behavior and then correct him.
Another example: I have friend let say his name is Joe. He always tells me about his older brother Jim. He is very proud of what his brother has done and tells me what he and his brother do all the time. I just recently found out Joe has a sister. He never told me about his sister. I could assume that since he never mentioned his sister, he must hate his sister. By the Adam and Steve argument, this conclusion can be made. Joe hates his sister since he never mentions her.
Reality: Joe loves his sister dearly and is very protective of her.
So you can see how this argument of Adam and Steve is illogical. It is on the basis that since this relationship did not exist in the bible, it is not ordained and thus a sin. There are many more things not mentioned in the bible that could be construed as sin. Since computers, telephones, email, smog producing cars, ozone depleting air conditioners, lightbulbs, and non - rated television shows are not in the bible, they can all be sins and morally wrong.
Tell me what you think.