I realise this is not really relevant to the world of books, but I was reading one on here earlier tonight which I enjoyed for the scholarship and research and the clear and competent writing (It was a Christian book regarding men and women and the biblical roots.) (Eve was made for Adam, not Adam for Eve, he came first etc.) I didn't, personally agree with the literal interpretation (Adam and Eve appearing literally as described) but that didn't affect the reading.
My question or point is this. IF you take it literally - and I know this question is an old joke but - SERIOUSLY - if Adam was created first and Eve was a later addition - then Adam would not have been provided with genitals at all, forget the nipples. What for? Therefore, in order for he and Eve to reproduce, were they added later?
Because it's a bit of a joke, the nipples thing, biblical literalists don't take it serously, but I want some answers! Why would Adam have been given equipment he didn't need? Therefore how did he and his newly created companion ever have children?
This is the book btw, it deserves a plug as it's a well researched and written project that I am not criticising by raising this possibly absurd thread!
http://www.authonomy.com/books/22190/what-every-woman-should-know/ 
Eve wasn't an afterthought. She was always in the plan. So reproductive organs were always needed, from the very beginning. She was created second, but only by moments - perhaps hours. They were created on the same day. It's not as if God said, "Oops, forgot that, now what do I do?" lol
I'm taking you at your word that you wanted a serious response from someone who believes the Bible.