Bisexuality

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Bisexual flag of three solid horizontal bars two fifths pink, one fifth purple, and two fifths blue.
Bisexual flag first used in 1998

Bisexuality is a romantic or sexual attraction or behavior toward both males and females (gender binary),[1][2][3] to more than one gender,[4] or to both people of the same gender and different genders.[5] It may also be defined to include romantic or sexual attraction to people regardless of their sex or gender identity, which is also known as pansexuality.[6][7][8]

The term bisexuality is mainly used for people that have both

heterosexual–homosexual continuum. A bisexual identity does not necessarily equate to equal sexual attraction to both sexes; commonly, people who have a distinct but not exclusive sexual preference for one sex over the other also identify themselves as bisexual.[10]

Scientists do not know the exact cause of sexual orientation, but they theorize that it is caused by a complex interplay of

hormonal, and environmental influences,[11][12][13] and do not view it as a choice.[11][12][14] Although no single theory on the cause of sexual orientation has yet gained widespread support, scientists favor biologically based theories.[11] There is considerably more evidence supporting nonsocial, biological causes of sexual orientation than social ones, especially for males.[3][9][15]

Bisexuality has been observed in various human societies,[16] as well as elsewhere in the animal kingdom,[17][18][19] throughout recorded history. The term bisexuality, like the terms hetero- and homosexuality, was coined in the 19th century by Charles Gilbert Chaddock.[20][21]

Definitions

Sexual orientation, identity, and behavior

Bisexuality is variously defined as romantic or sexual attraction to both males and females,[1][2][3] to more than one gender,[22] or attraction to both people of the same gender and different genders.[5] The American Psychological Association states that "sexual orientation falls along a continuum. In other words, someone does not have to be exclusively homosexual or heterosexual, but can feel varying degrees of both. Sexual orientation develops across a person's lifetime–different people realize at different points in their lives that they are heterosexual, bisexual or homosexual."[10][23] Attraction can take numerous forms for bisexuals, such as sexual, romantic, emotional, or physical.[24]