| gender role | A culturally expected pattern of behavior and attitudes determined by whether a person is male or female.
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| attachment | The emotional tie between an infant and his or her caregiver or between two people in an intimate relationship.
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| infatuation | An idealizing, obsessive attraction, characterized by a high degree of physical arousal.
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| cohabitation | Living together in a sexual relationship without being married.
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| sexual orientation | A consistent pattern of emotional and sexual attraction based on biological sex; it exists along a continuum that ranges from exclusive heterosexuality (attraction to people of the other sex) through bisexuality (attraction to people of both sexes) to exclusive homosexuality (attraction to people of one's own sex).
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| homosexual | Emotional and sexual attraction to people of one's own sex.
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| heterosexual | Emotional and sexual attraction to people of the other sex.
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