Editing Infidelity (section)

===Anthropological viewpoint===
Anthropologists tend to believe humans are neither completely [[monogamous]] nor completely [[polygamous]]. Anthropologist Bobbi Low says we are "slightly polygamous", while Deborah Blum believes we are "ambiguously monogamous", and slowly moving away from the polygamous habits of our evolutionary ancestors.<ref name="Adultery by Louise DeSalvo">''Adultery'' by Louise DeSalvo.</ref>

According to [[anthropologist]] Helen Fisher, there are numerous psychological reasons for adultery. Some people may want to supplement a marriage, solve a sex problem, gather more attention, seek revenge, or have more excitement in the marriage. But based on Fisher's research, there also is a biological side to adultery. "We have two brain systems: one of them is linked to attachment and romantic love, and then there is the other brain system, which is purely sex drive." Sometimes these two brain systems are not well-connected, which enables people to become adulterers and satisfy their libido without any regards to their attachment side.<ref>{{cite news|url=http://www.dailytargum.com/university/adultery-has-roots-in-psychology-biology-1.2208541|title=Adultery has roots in psychology, biology|last=Kathiya|first=Henna|date=1 April 2010|work=The Daily Targum|access-date=16 September 2011|archive-url=https://web.archive.org/web/20110821053741/http://www.dailytargum.com/university/adultery-has-roots-in-psychology-biology-1.2208541|archive-date=August 21, 2011|url-status=dead|publisher=Rutgers University}}</ref>