Bisexuality
In 1948, Alfred Kinsey published the Kinsey scale. The Kinsey scale shows that sexuality is a continuum. This means it moves little by little from heterosexuality to homosexuality. On the Kinsey scale, a 0 is someone who is only heterosexual. A 6 is someone who is only homosexual. Someone who is equally homosexual and heterosexual (bisexual) is a 3.