It's estimated that 3.5 percent of adults in the United States identify themselves as lesbian, gay or bisexual individuals, and an estimated 0.3 percent of adults also identify themselves as transgender. According to the Williams Institute, this means that approximately 9 million Americans are part of the LGBT community.
Yet many sexist stereotypes still exist against such individuals. A recent study looks at how heterosexual men perceive bisexuality. Many do not believe it is a "legitimate sexual orientation," according to researchers from the University of Pittsburgh Graduate School of Public Health.