To clearly understand the present one must look into the past and try to understand why things are shaped the way they are. First let's take a look at the two-sex system. Deborah Blum, in her book Sex on the Brain asks, "Do we really need two sexes? It is worth asking only because sex is so fundamental to life on earth, to who we are now. For species to evolve and prosper self-productive sex should be adequate. But in nature and biology, everything that is living belongs to one sex or the other. Two sexes are a part of life, and frankly nothing can be done about it, so why not concentrate on how to live with it?
In the beginning of time, the earth was just a partially cooled rock flung off