Till Death Do Us Part?

Yet, socially, it appears humans favor monogamy.

Helen Fischer, a professor of anthropology at Rutgers University looked at ninety-seven societies, and found that 92 percent of men and 93 percent of women marry, and most take only one spouse.

There is even brain wiring that sets us up for this long-term attachment.

While the first stages of romantic courtship involve lust, ruled by the powerful hormone testosterone, followed by love, ruled by the feel good hormones serotonin and dopamine, we eventually settle into long-term attachment.

This is thought to be fueled by oxytocin and vasopressin, which make us feel connected to both mates and children.