Many people swear by the notion that there is only have one person in the world whom we can call our "soulmate." In their view, destiny has picked out one individual who complements them on myriad levels -- physically, mentally, emotionally, and even spiritually -- like no one else. And the ones lucky enough to be in long-term relationships, not surprisingly, say they're confident their partner is their other half. But is this really true? Can only one person in this entire world -- mind you, there are 7.6 billion human beings living on this planet -- be ideally suited for us? While I would love to believe that life plays out like a fairy tale, I can't subscribe to the idea that we couldn't click and carry on successful relationships with several people -- whether we live in London or Las Vegas. Instead, I believe that we can have varying degrees of compatibility with different people, and it's up to us to decide which differences are too much to bea...