I have been thinking about this...Are you familiar with Brene Brown's work? She is a sociologist who studies shame and vulnerability. Shame is a human experience, and it drives a lot of our negative behavior that gets catagorized as "sin". Since I've left, I now feel that what gets catagorized as "sin" is not inheritly right/wrong but often falls into the catagory of "that is not good for you/society, so don't do it" - for example, fornication. There is not anything inheritly wrong with having sex with someone you are not married to - but it is better for society to have stable families and it is not good for a person to sleep around with anyone and everyone...so it becomes a cautionary "sin"...
If you believe the story of Adam and Eve, their sense of shame over being naked - that sense that something is wrong with me - came from a break in their relationship to God. Their "sin" was their disregard a spiritual need.
Maybe this story is telling us the origin of the sense of shame we all feel at times, or maybe it is a story set up to explain it away and normalize it.