This was interesting to read, the suggestion of pair boding as the natural structure for human relationships. For all my philandering about, I would never deny the desire to have a partner (friend or lover) who was a constant in life. Someone to call home.

THE HUMAN SEXUAL CONDITION: PROGRAMMED FOR POLYGAMY
by Dr. Gabriel Loch-Lainn Seabrook

There are some individuals who would call it "lifetime monogamy." But those individuals would be wrong. In fact, anthropological studies show that humans are not designed for lifetime monogamy, and that even in societies (such as the U.S.A. and England) where lifetime monogamy is held to be the ideal, only a tiny fraction of couples actually practice it. To the contrary, nearly all people, following our prehistoric ancestor's basic mating pattern, form a temporary pair-bond with a single mate, separate, then go in search of a new partner with whom she or he forms another brief, tenuous bond. This primal custom is overtly reflected in our obsession with dating, and in our extremely high rates of desertion, infidelity, divorce, and remarriage. Some go even further by incorrectly referring to this type of short-term intimate bonding as "serial monogamy." An objective observer will quickly realize, however, that our love of short-term pair-bonding is actually a form of what is called, "serial polygamy": having a series of temporary monogamous relationships; not simultaneously (as in straight polygamy), but in succession, spread out over time. More to the point, the modern human practice of both serial polygamy, and the far less popular lifetime monogamy, are rooted firmly in the soil of prostitution, an element without which no sexual relationship could exist.