::There are cheaters out there that claim they are polyamorus and cite being polyamorus as there reason for cheating.  I've talked to these people face to face.  Their logic was that they consider it their sexual orientation and drew an analogy to a "closeted" homosexual person being in an opposite-sex marriage for sake of appearances, and then having same-sex affairs without the spouse's knowledge or consent.  But thinking that all cheating is polyamory is obviously incorrect and not supported by any reliable source. At best the individuals I met represent a teeny tiny portion of the cheating population.  Cheating is complex and happens for many reasons.