" Only about 3 percent of animal species are monogamous. A couple of penguins, some otters and a few other oddball critters. To these select few it comes natural to mate for life and never look at another member of the opposite sex. Humans are not part of that little club. Like the other 97% of species, humans are not monogamous by nature. We just pretend that we are. "

― , Why Men And Women Can't Be Friends