Jealousy
Sexual jealousy
Sexual jealousy may be triggered when a person's significant other displays sexual interest in another person. The feeling of jealousy may be just as powerful if one partner suspects the other is guilty of infidelity. Fearing that their partner will experience sexual jealousy the person who has been unfaithful may lie about their actions in order to protect their partner. Experts often believe that sexual jealousy is in fact a biological imperative. It may be part of a mechanism by which humans and other animals ensure access to the best reproductive partners.
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