Personally, I do not the believe the Bible cannot be taken literally. My denomination, the UCC, interprets the Scriptures from a metaphorical & allergorical perspective. Some do interpret in literally as the denom. is diverse as its name suggests. Overall, it is a liberal & welcoming denomination.
The story of Adam & Eve, to me, is a myth inspired by Mesopotamian religion in ancient times. Indeed, the mentioning of Leviathan suggests a re-interpretation of the Babylonian Tiamut, the evil searpent slayed by the good god El. In one were to take it literally, then everyone could be interpreted as being born from incestuous union in regards to Adam & Eve.
Diagreed: how does the story of the Fall support one man, one woman relationship only. It does not mention the sin of having too many wives...
In regards to Scriptural interpretation, why would the Bible only be interpreted literally? Isn't God bigger than simple stories? Jesus used parables (allergory) to teach lessons about life. Why couldn't the Bible be an allergorical story? Regardless, differences in opinion are & should be diverse. If you take a conservative approach, then okay, but I can disagree.
Anyway, I don't see why one (or more) sacred text should be used to legislate discrimatory laws, and prevent basic human rights to everyone based on one interpretation.
"First, they laugh at you. Then they fight you. Then you win."-- Mahatma Gandhi
Peace & Blessings,