A spectrasexual is a term used to refer to a person who is attracted to a wide range of individuals, including those of different sexes, genders and gender expressions. Spectrasexuality is considered to be a sexual orientation.
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An individual that identifies as a spectrasexual does not have a specific set of qualities that he or she finds to be attractive. Bisexuality is too narrow of an identity because someone who is spectrasexual is attracted to individuals who fall outside of the gender and sexuality dichotomy of male and female as well as homosexual and heterosexual. The idea is that an individual is attracted to people who fall within a wide range on the gender/sexuality spectrum.