There are loads of problems with the Genesis account, and even more problems with the JW interpretation of it.
Some of the previous threads on here, especially ones by Leolaia, make much more sense of the account, when looked at from a Jewish mythology point of view - things like the word "perfection" or the snake being Satan not even being mentioned in the account, but were later Xian additions.
I seem to remember the mythology does have something like Adam and Eve as being far more "child-like" than the WT interpretation, and not knowing about sex either - that's why only after they had eaten from the tree they realised they were naked? Presumably God was later going to aquaint them with "doing the business" as a reward for not eating of the tree or something?