I suspect that this is referring to what Milton wrote earlier about Eve being created to serve Adam, or to the inaccurate translation saying that Eve was created from Adam's rib. But note the many articles (as well as contemporary translations of Genesis, such as Mary Korsak's At the Start: Genesis Made New - see http://www.maryphilkorsak.com/1publiceng.html ) that note that the Hebrew word for RIB is the same as the word for SIDE, and that word is used throughout the old and New Testament to mean SIDE, never rib. So there is no reason - except patriarchal reasons seeking to justify male superiority - to believe that this one use of the word in Genesis is an exception to use of the word elsewhere in the Bible. According to one of the stories of Eve's creation in the Bible, she was created from Adam's side and may indeed be from half of Adam; according to the other story of creation in Genesis - and there are two - Adam and Eve were created together.