He also never mentioned bestiality, but somehow I don't see that as a ringing endorsement.
The root of this problem is this: to arrive at this conclusion you first must deny the Devine Inspiration of Scripture. Once you do that you can relegate anything not in red print as just being man's opinion based on a cultural bias.
What it does is to reject the Bible as a revelation, the acceptance of which is to enter into a covenent with God altogether different from the gods of Egypt and Babylon.