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Kinsey's book, and its companion Sexual Behavior in the Human Female, have received vocal criticism for their findings and methodology.   Professor Martin Duberman called it "skillful" and "a monumental endeavor".  Dr.
Fritz Klein believed that social and emotional attraction are very important elements in bisexual attraction.
Bisexuality refers to sexual behavior with  or attraction to people of multiple genders, or to a bisexual orientation.
People who have a bisexual orientation "can experience sexual, emotional, and affectional attraction to same and opposite genders"; "it also refers to an individual’s sense of personal and social identity based on those attractions, behaviors expressing them, and membership in a community of others who share them." It is one of the three main classifications of sexual orientation, along with a heterosexual and a homosexual orientation.
Because bisexuality is often an ambiguous position between homosexuality and heterosexuality, bisexuals form a heterogeneous group and the relations between their behaviors, feelings, and identities are not always consistent.
Some who might be classified by others as bisexual on the basis of their sexual behavior self-identify primarily as homosexual.
Although Kinsey's methodology has been criticized, the scale is still widely used in describing the continuum of human sexuality.The same study found that 2.8 percent of women ages 18–44 considered themselves bisexual, 1.3 percent homosexual, and 3.8 percent as "something else". The Janus Report on Sexual Behavior, published in 1993, showed that 5 percent of men and 3 percent of women consider themselves bisexual and 4 percent of men and 2 percent of women considered themselves homosexual.The 'Health' section of The New York Times has stated that "1.5 percent of American women identify themselves [as] bisexual. Alfred Kinsey's 1948 work Sexual Behavior in the Human Male found that "46% of the male population had engaged in both heterosexual and homosexual activities, or "reacted to" persons of both sexes, in the course of their adult lives".Unlike members of other minority groups (e.g., ethnic and racial minorities), most LGB individuals are not raised in a community of similar others from whom they leam about their identity and who reinforce and support that identity.Rather, LGB individuals are often raised in communities that are either ignorant of or openly hostile toward homosexuality."  In a longitudinal study about sexual identity development among lesbian, gay, and bisexual (LGB) youths, its authors "found evidence of both considerable consistency and change in LGB sexual identity over time." Youths who had identified as both gay/lesbian and bisexual prior to baseline were approximately three times more likely to identify as gay/lesbian than as bisexual at subsequent assessments.