Sexual jealousySexual jealousy is a special form of jealousy in sexual relationships, based on suspected or imminent sexual infidelity. The concept is studied in the field of evolutionary psychology. Evolutionary psychologists have suggested that there is a gender difference in sexual jealousy, driven by men and women's different reproductive biology. The theory proposes that a man perceives a threat to his relationship's future because he could be fooled into raising children that are not his own.
CuckqueanA cuckquean is the wife of an adulterous husband (or partner for unmarried companions), and the gender-opposite of a cuckold. In evolutionary biology, the term is also applied to females who are investing parental effort in offspring that are not genetically their own. Similar prying within a family is called wittoldry. The term is derived from Early Modern English dating back to AD 1562 and is composed of the terms cuck "someone whose partner is unfaithful" and quean "disreputable woman".
AdulteryAdultery (from Latin adulterium; ad- + alterō, “I change/alter [one lineage for another”]) is extra-marital sex partaken by a spouse, or premarital sex partaken by a betrothed person, that is considered objectionable on social, religious, moral, or legal grounds. Although the sexual activities that constitute adultery vary, as well as the social, religious, and legal consequences, the concept exists in many cultures and shares some similarities in Christianity, Judaism and Islam.
PolyandryPolyandry (ˈpɒliˌændri,_ˌpɒliˈæn-; ) is a form of polygamy in which a woman takes two or more husbands at the same time. Polyandry is contrasted with polygyny, involving one male and two or more females. If a marriage involves a plural number of "husbands and wives" participants of each gender, then it can be called polygamy, group or conjoint marriage. In its broadest use, polyandry refers to sexual relations with multiple males within or without marriage.
