The writer Plato (well known Grecian writer of philosophical dialogue in a Socratic fashion) wrote this story. It tells of the genders: male, female, and the androgynous half male/half female. This is also a foreshadowing of the different sexualities. In the story of Aristophanes of the Symposium, Plato describes the human race as being powerful and feared by the gods. The humans had plan to climb Olympus mountain and over-throw the gods. In fear, Zeus decreed the humans be split in two: male, making the homosexual male andmale; female, the homosexual female andfemale; and male/female, obviously the heterosexual male and female.
This also creates the concept of the soulmate, or the "other half." As each human that once was one, they were split in two. They are doomed to forever search for their other half to become one, despite not truly being one - but can "become" one through a couple means.
1) Sexual - in short, it was said that the means of true wholeness was to come together in a sexual act, as this is why Zeus gave use reproductive systems when or whole bodies were separated into two. Within the heterosexual, this is displayed by coming together as two to make one. Yet, even in concern of all three aspects of sexuality, the two separated souls long for each othet and search for each other. They seek to come together as one. And a means of this unity and meshing of energies for completeness was by sexual acts.
2) Non-sexual - this one is just about the same, minus the obvious. The two long and search for each other. However, this is a little less physical and just as spiritual and energetic. The two can communicate, even at a distance (such as electronic communication given by modern technology or mail), and through this their energies and souls can click and come together. They don't have to be in a intimate relationship. They can be simply good friends, even relatives. It's the growth of the relationship and love that is just naturally there that helps the unity. And even just as good is to soend time with each other physically present. They do what feels natural in the process. Not forcing it. And if the natural occurrence includes a bit more - then please refer back to point 1 with this explanation. If not, that's just fine too.
This separation weakened the humans so they could not climb the mountain.
As with the other writings within the Symposium, this story tells us a lesson on love, not only with humans but in relations to the gods. Aristophanes tells that we should fear the gods for what they can do to us , but is we truly work with love we can find wholeness once again.