God and nature have made some of us hunters and prodigious omnivores, so we can eat all kinds of foods in order to survive the merciless process of evolution, and pass our genes onto the next generation. Thus, if you became a herbivore, and can’t get pregnant as a result, this may mean an evolutionary dead end for your bloodline. And that is why your longing for having a child is so strong -- it is, after all, an instinct...