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Extramarital sex  Sexual activity between a married person and someone other than that person's spouse; adultery.
Swinging  A form of extramarital sex in which married couples exchange partners with each other.
Cyberaffair  A romantic or sexual relationship initiated by online contact and maintained primarily via online communication.
Equity theory  A theory that states that people mentally calculate the benefits and costs for them in a relationship; their behavior is then affected by whether they feel there is equity or inequity, and they will act to restore equity if there is inequity.
Polyamory  The nonpossessive, honest, responsible, and ethical philosophy and practice of loving multiple people simultaneously.
Hysterectomy (hiss-tur-EK-tuh-mee)  Surgical removal of the uterus.
Oophorectomy (OH-uh-fuh-REK-tuh-mee)  Surgical removal of the ovaries.
Prostatectomy (pros-tuh-TEK-tuh-mee)  Surgical removal of the prostate.







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