I get it from Numbers 13:33 and well, Goliath
And there we saw the giants, the sons of Anak, which come of the giants: and we were in our own sight as grasshoppers, and so we were in their sight
Even the NIV says We saw the Nephilim there
But the reason I think it's metaphorical is, because we know the trees are. Do you know what the tree of life is, or who?
It's like a family tree, the bloodline in which Jesus came. We all know Jesus came through the blood line of Adam, then Abraham, then King David. He didn't come through Caine's blood line.
We know it wasn't a literal serpent, like I was told my entire life. Most of my friends believe it was a snake.
And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years, rev 20:2
again Luke 10:19
Behold, I have given you authority to tread on serpents and scorpions, and over all the power of the enemy, and nothing shall hurt you.
This verse isn't talking about snakes and bugs, ask the families of the snake handling preachers who are dead now. the scorpions are also mentioned in Rev 9
The serpent was metaphorical for Satan, the tree of life is metaphorical for Jesus Christ, then is it fair to assume the fruit was metaphorical for sex?