Ah yes, the Lilith mythology.
As the story goes, that I've read, Lilith liked to be on top during sex (come on, what guy doesn't like that

) Apparently, Adam didn't like that. So he banished her and she turned into some reptilian monster that gave birth to many children. Then Adam got a subservient "wife" called Eve. I guess it cost him a rib.
I dunno, maybe there is more to mythology than meets the eye?