If God is a hermaphrodite, why not just make both Adam and Eve hermaphrodites. That idea's not tracking.
The question is, if God is all powerful why did he need a rib? Why did He need to use clay? Why did the fall happen? etc . The Genesis God doesn't work like that.
Additionally, if God knew that he was later make Eve, why did Adam have to ask?
Just because He wrote the script, doesn't mean it doesn't have to be followed. He knew Adam was going to ask, and He knew that would lead to him doing it.
And, since sex is such a sin, why not just go with sinless asexual reproduction like we've seen in other life forms here on Earth?
Sex isn't a sin.