Bismillah
I m sorry Shamms, but I think you are getting my point but trying to evade it. The problem is not the metaphore, the problem is the explicit language, such as the part, I really dont want to type this here. But enough to use one example of the woman recalling her lovers in Egypt whose.. like donkeys and .... like horses. This is not metaphore, this is porno, sorry to say.
When I discussed this same point with my Jewish co worker at that time, she honestly said, I understand your point that is why we dont call it a divine book but rather legends of the ealier generations. At least she was honest and logical about it.