Does eating imply defecation?

As I read some of the posts I had to wonder ... it is difficult to speculate this side of the fall. Our bodies, though most likely still quite similar, could have functioned more efficiently than they currently do. This was the case in aging for sure ... imagine living for nearly a millennium! It would be like me reminiscing about the atrocities of the Crusades!

So, my question is, "Does eating imply defecation?" I don't think it is too hard to believe that Adam and Eve's bodies worked so efficiently that whatever they ate was completely consumed and transformed into usable energy (hence no waste).

And about sexual intercourse. One problem I see is that if sex was intended for procreation, and that Adam and Eve had loads of sex ... why did she never get pregnant? Was it defective ... certainly not. The first time it is spoken of that she gets pregnant is after the fall. So either they never had sex or they had sex but it never produced what it was intended to do.