This is a pretty simple view. The excitements are not rejected by the body, they never have entered the body. The intestines should be seen as a vessel through the body rather than in the body and the body absorbs what he needs, everything else passes through, therefore what is not to love in the excremental output, since it is just your processed food (I assumed you loved your food while you are it). So there is to everything another side to look at it.