Most of us know what love is (or at least we know what it feels like), but what makes us love and bond to one person is a mystery. There has been a lot of bile regurgitated over the issue of defining marriage and love, specifically on the issue surrounding whether marriage should be defined as a union between a man and a woman or whether gay couples should be afforded the same rights as heterosexual couples. Besides the pile of civil rights issues that drive the debate, there are some significant biological issues that have been raised about monogamy, and whether there is a biological reason why so many marriages fail. The divorce rate would seem to imply that there is at least the possibility that not all humans are biologically designed to be monogamous for life. Many blame this increasing trend of serial monogamy on immoral values being accepted by society. But it would appear as though a lot of what is being seen is not a case of immoral pursuits or a lack of value on the family unit, but an acceptance that things go wrong in marriages and people grow apart. Is this a reflection of biology?