soul-mates.

I once heard this story when I was little. It's a story from ancient Greek mythology. I hope you like it.

At the beginning of time the Gods had created people with two heads, and four legs. Zeus one day looked down from Olympis and relaized that there was great love between the two heads, and he took his bright bolt of lightening and split the being right down the middle. Then he took the new people, who now had merely only one head and two arms, and he put them as far apart as earth would allow them to be.
Inside the two people had a new emptiness inside of them, and they realized that they were feeling a need for the other. Now people spend their lives trying to find that other half, their soul-mate. And now, they find each other, everyday.