A bisexual identity affirms a reality beyond dualistic categories of sexual orientation and challenges the privileging of single-gender orientation.
Bisexuals come from all social, economic, and cultural strata.
It is difficult to estimate how many bisexuals there are because most studies on sexuality have focused on heterosexuals or homosexuals. Some studies have looked at both, but usually with the assumption that bisexuals do not exist as a category. In such cases, bisexuals are counted as either homosexual or heterosexual depending on the gender of their partner. History Bisexuals began organizing social and support groups in several US cities in the early 1970s. By the early to mid-1980s, bisexual political action groups formed to combat stereotypes and to give a voice to bisexual people and their issues.